Welcome to the board, Jeff!
Getting/staying involved with your local Burner community is a really good idea. Make friends! Join a camp. Ask L.A. folks when the best time is to make a wheelchair accessible RV reservation. (You'll probably have a little more time than if you were trying to make a reservation in Reno or Vegas. Those cities' reservations go the very fastest).
Health-wise: Breaking the news to your physicians as soon as possible is another good idea. Tell them you plan to be in a very hot, dry environment where there are duststorms with very small particles the approximate consistency of baby powder ('cause it's not really sandy at all out there; it's true dust). You'll probably need specific monitors to check yourself out regularly. Travel health insurance is a must. Basic medical treatments on the playa are free, but if you need to be evacuated to Reno, an ambulance or a helicopter will really cost you, as I'm sure you're aware.
And here is some info on disability licenses. You are allowed to tour the playa in a personal vehicle (at 5mph) if you have a disability license.http://www.burningman.com/on_the_playa/ ... enses.html