I think it would be doable, if they have some strong help.

Mayan and Tropic are used to lifting people on and off their planes, due to illness usually.

Golf cart would be the ticket, and carry the wheelchair on the back.

Many restaurant and bars are street level.

Sunbreeze across from the airstrip can be reached by the wheelchair easily, and Sunbreeze has a front entry ramp, smooth tiled walkways all around and ramps to the restuarant and pool also. The pool and restaurant are right on the beach with great views of all the water activity.

Golf cart can be driven around the dive shop and enter the courtyard from the beach, and park the cart right in front of your room on the ground floor.

Dare To Deviate