If all you want is a fabulous beach and a perfectly mixed mai tai, then Maui has what you're looking for. But the island's wealth of natural wonders is equally hard to resist; the year-round tropical climate and spectacular scenery tend to inspire almost everyone to get outside and explore.

If you don't have your own snorkel gear or other watersports equipment, or if you just don't feel like packing it, don't fret: Everything you'll need is available for rent.

Outdoor Etiquette -- Act locally, think globally, and carry out what you carry in. Find a trash container for all your litter (including cigarette butts; it's very bad form to throw them out of your car window or to use the beach as an ashtray). Observe KAPU (taboo) and NO TRESPASSING signs. Don't climb on ancient Hawaiian heiau (temple) walls or carry home rocks, all of which belong to the Hawaiian volcano goddess, Pele. Some say it's just a silly superstition, but each year the national and state park services get boxes of lava rocks in the mail that have been sent back to Hawaii by visitors who've experienced unusually bad luck.

Setting Out on Your Own Versus Using an Outfitter

There are two ways to go: Plan all the details before you leave and either rent gear or schlep your stuff 2,500 miles across the Pacific, or go with an outfitter or a guide and let someone else worry about the details.

Experienced outdoors enthusiasts may head to coastal campgrounds or even trek to the 10,000-foot-high summit of Haleakale on their own. But in Maui, it's often preferable to go with a local guide who is familiar with the conditions at both sea level and summit peaks, knows the land and its flora and fauna in detail, and has all the gear you'll need. It's also good to go with a guide if time is an issue or if you have specialized interests. If you really want to see native birds, for instance, an experienced guide will take you directly to the best areas for sightings. And many forests and valleys in the interior of the islands are either on private property or in wilderness preserves accessible only on guided tours. The downside? If you go with a guide, plan on spending at least $100 a day per person.

But if you have the time, already own the gear, and love doing the research and planning, try exploring on your own. This book discusses the best spots to set out on your own, from the top offshore snorkel and dive spots to great daylong hikes, as well as the federal, state, and county agencies that can help you with hikes on public property; I also list references for spotting birds, plants, and sea life. I recommend that you always use the resources available to inquire about weather, trail, or surf conditions; water availability; and other conditions before you take off on your adventure.

For hikers, a great alternative to hiring a private guide is taking a guided hike offered by the Nature Conservancy of Hawaii, PO Box 96, Honolulu, HI 96759 (tel. 808/572-7849 on Maui, or 808/553-5236 on Molokai); or the Hawaii Chapter of the Sierra Club, PO Box 2577, Honolulu, HI 96813 (tel. 808/579-9802 on Oahu; www.hi.sierraclub.org). Both organizations offer guided hikes in preserves and special areas during the year, as well as day- to weeklong work trips to restore habitats and trails and to root out invasive plants. It might not sound like a dream vacation to everyone, but it's a chance to see the "real" Hawaii -- including wilderness areas that are ordinarily off-limits.

All Nature Conservancy hikes and work trips are free (donations are appreciated). However, you must reserve a spot for yourself, and a deposit is required for guided hikes to ensure that you'll show up; your deposit is refunded when you do. The hikes are generally offered once a month on Maui, Molokai, and Lanai. For all islands, call the Oahu office for reservations. Write for a schedule of guided hikes and other programs.

The Sierra Club offers weekly hikes on Maui. They are led by certified Sierra Club volunteers and are classified as easy, moderate, or strenuous. These half- or all-day affairs cost $1 for Sierra Club members and $3 for nonmembers (bring exact change). For a copy of the club newsletter, which lists all outings and trail-repair work, send $2 to the address above.

For more information, contact the Hawaii Ecotourism Association (tel. 877/300-7058; www.hawaiiecotourism.org).

Using Activities Desks to Book Your Island Fun

If you're unsure of which activity or which outfitter or guide is the right one for you and your family, you might want to consider booking through a discount activities center or activities desk. Not only will they save you money, but good activities centers should also be able to help you find, say, the snorkel cruise that's right for you, or the luau that's most suitable for both you and the kids.

Remember, however, that it's in the activities agent's best interest to sign you up with outfitters from which they earn the most commission. Some agents have no qualms about booking you into any activity if it means an extra buck for them. If an agent tries to push a particular outfitter or activity too hard, be skeptical. Conversely, they'll try to steer you away from outfitters who don't offer big commissions. For example, Trilogy, the company that offers Maui's most popular snorkel cruises to Lanai (and the only one with rights to land at Lanai's Hulopoe Beach), offers only minimum commissions to agents and does not allow agents to offer any discounts at all. As a result, most activities desks will automatically try to steer you away from Trilogy.

Another word of warning: Stay away from activities centers that offer discounts as fronts for timeshare sales presentations. Using a free or discounted snorkel cruise or luau tickets as bait, they'll suck you into a 90-minute presentation -- and try to get you to buy into a Hawaii timeshare in the process. Because their business is timeshares, not activities, they won't be as interested in, or as knowledgeable about, which activities might be right for you. These shady deals seem to be particularly rampant on Maui.

There are a number of very reliable local activities centers on each of the neighbor islands. On Maui, your best bet is Tom Barefoot's Cashback Tours, 250 Alamaha St., Kahului (tel. 800/895-2040 or 808/661-8889; www.tombarefoot.com). Tom offers a 10% discount on all tours, activities, and adventures if you pay using cash, a personal check, or traveler's checks. If you use a credit card, you'll get a 7% discount. Finally, you can reserve activities yourself and save the commission by booking via the Internet. Most outfitters offer 10% to 25% off their prices if you book online.

Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.