Insurance

Check your existing insurance policies and credit card coverage before you buy travel insurance. You may already be covered for lost luggage, canceled tickets, or medical expenses. The cost of travel insurance varies widely, depending on the cost and length of your trip, your age, your health, and the type of trip you're taking. You can get estimates from various providers through InsureMyTrip.com. Enter your trip cost and dates, your age, and other information, for prices from more than a dozen companies.

For U.K. citizens, insurance is always advisable when traveling in the States. Travelers or families who make more than one trip abroad per year may find an annual travel insurance policy works out cheaper. Check www.moneysupermarket.com, which compares prices across a wide range of providers for single- and multi-trip policies.

Most big travel agents offer their own insurance and will probably try to sell you their package when you book a holiday. Think before you sign. Britain's Consumers' Association recommends that you insist on seeing the policy and reading the fine print before buying travel insurance. The Association of British Insurers (tel. 020/7600-3333; www.abi.org.uk) gives advice by phone and publishes Holiday Insurance, a free guide to policy provisions and prices. You might also shop around for better deals: Try Columbus Direct (tel. 0870/033-9988; www.columbusdirect.net).

Trip-Cancellation Insurance

Trip-cancellation insurance will help retrieve your money if you have to back out of a trip or depart early, or if your travel supplier goes bankrupt. Trip cancellation traditionally covers such events as sickness, natural disasters, and State Department advisories. The latest news in trip-cancellation insurance is the availability of expanded hurricane coverage and the "any-reason" cancellation coverage -- which costs more but covers cancellations made for any reason. You won't get back 100% of your prepaid trip cost, but you'll be refunded a substantial portion. TravelSafe (tel. 888/885-7233; www.travelsafe.com) offers both types of coverage. Expedia also offers any-reason cancellation coverage for its air-hotel packages.

For details, contact one of the following recommended insurers: Access America (tel. 866/807-3982; www.accessamerica.com); Travel Guard International (tel. 800/826-4919; www.travelguard.com); Travel Insured International (tel. 800/243-3174; www.travelinsured.com); and Travelex Insurance Services (tel. 888/457-4602; www.travelex-insurance.com).

Medical Insurance

Although it's not required of travelers, health insurance is highly recommended. Most health insurance policies cover you if you get sick away from home -- but check your coverage before you leave.

Kauai, like the rest of Hawaii, mandates health insurance for employees, so most medical offices require some kind of health insurance.

International visitors should note that unlike many European countries, the United States does not usually offer free or low-cost medical care to its citizens or visitors. Doctors and hospitals are expensive, and in most cases will require advance payment or proof of coverage before they render their services. Good policies will cover the costs of an accident, repatriation, or death. Packages such as Europ Assistance's "Worldwide Healthcare Plan" are sold by European automobile clubs and travel agencies at attractive rates. Worldwide Assistance Services, Inc. (tel. 800/777-8710; www.worldwideassistance.com) is the agent for Europ Assistance in the United States.

Though lack of health insurance may prevent you from being admitted to a hospital in non-emergencies, don't worry about being left on a street corner to die: The American way is to fix you now and bill the living daylights out of you later.

If you're ever hospitalized more than 150 miles from home, MedjetAssist (tel. 800/527-7478; www.medjetassistance.com) will pick you up and fly you to the hospital of your choice in a medically equipped and staffed aircraft 24 hours day, 7 days a week. Annual memberships are $225 individual, $350 family; you can also purchase short-term memberships.

Canadians should check with their provincial health plan offices or call Health Canada (tel. 866/225-0709; www.hc-sc.gc.ca) to find out the extent of their coverage and what documentation and receipts they must take home in case they are treated in the United States.