It's not perfect, but Bonaire is a relatively friendly destination for travelers with disabilities.
Many resorts offer accessible rooms, restaurants and docks. Several resorts – including Captain Don's Habitat – have staff trained in assisting disabled divers, with extensive experience training and guiding groups of disabled US Vets.
In Kralendijk, the cruise-ship terminal has a wheelchair ramp, as do many sidewalks around town. Roro Services offers wheelchair-accessible transportation and tours.
Download Lonely Planet's free Accessible Travel guide from http://lptravel.to/AccessibleTravel.