Lori... As far as transportation, I have found most airports to have some sort of regular ground transportaion within the airport and outside on the property. By law, some of this, if not all, of it must be accessible.
In getting away from the airport, SuperShuttle is one taxi company I see a lot of (and have used) and it has accessible vans if you call ahead. We usually do that at least a day early but they should be available when you call or soon after to get you where you're going. Yellow Cab also has accessible taxis in most places. (Both have these, I believe, are due to ADA complaints and legal, binding settlement agreements.)
Wheelchair Getaways is a company that rents wheelchair accessible vans. There are others but I can't think of the names.
It's all in the planning.
Best to All!
Tod... (having 'net problems... so I'm not on much)

