Central America generally isn’t well equipped for those with disabilities: services such as specially equipped phones, toilets or anything in braille are rare to the point of nonexistence. Expensive international hotels are more likely to cater to guests with disabilities than cheap hotels; air travel or pre-arranged transportation will be more feasible than most local buses; and off-the-beaten-track destinations will be less accessible than well-developed ones.
Belize and Costa Rica are better equipped for travelers with mobility issues than other Central American countries (due in part to the many elderly travelers who arrive on cruise ships). In both countries, it's possible to find hotels and attractions that can accommodate wheelchairs, especially in the most popular tourist spots. Some of Costa Rica's national parks are also wheelchair-accessible, including Parque Nacional Volcán Poás and Parque Nacional Carara.
Accessible Travel Online Resources
Download Lonely Planet's free Accessible Travel guides from http://lptravel.to/AccessibleTravel.