Many people prefer traveling alone. Unfortunately, the solo traveler is often forced to pay a premium price for the privilege of sleeping alone. On package vacations, single travelers are often hit with a "single supplement" to the base price. To avoid it, you can agree to room with other single travelers on the trip, or you can find a compatible roommate before you go from one of the many roommate locator agencies.
GAP Adventures (tel. 800/708-7761 in North America, or 44/870-999-0144 in the United Kingdom; www.gapadventures.com) is an adventure tour company with a good range of regular and varied tours in Central America. As a policy, they do not charge a single supplement and will try to pair a single traveler with a compatible roommate.
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.