First, the advice to check out the RVing with Disabilities forum here is right on! You'll find info on many issues: How to lift the scooter into the RV, how to store/carry the scooter outside, etc.
Second, there are several general categories of mobility scooters:
- Indoor/outdoor scooters (narrow width; smaller wheels; can be 3 or 4 wheels)
- Outdoor travel scooters (wider, more stable base; heavier motor / batteries)
- Folding scooters (designed for trunk, overhead bin, etc.; lightweight platform; lighter weight / less powerful batteries)
- "Bariatric" scooters (designed for heavier weight patients; usually requires platform lift to raise)
As a former regional sales manager for one of the oldest scooter manufacturer, a vocational rehabilitation counselor/supervisor of over 25 years, and a full-time scooter user (post-polio quad) since 1981, we have tried &/or used all sorts of scooters around the world (NA, Europe, Australia, Africa). There are major differences between units in the same categories; these have been discussed in the Disabilities forum, and we can respond to PM's if you need more info.
Getting them in/out of any RV is a very challenging effort. If you're not requiring use
inside your RV, look at folding scooters or "Harmar"-type bumper platforms to transport them, and a seat-type lift (Burr Handi-Lift, etc.) to raise the rider into the interior. If you do need to use it inside, then you probably need a Class A or C coach or toy-hauler trailer designed for accessibility.
Good luck, and hope she can enjoy her travels without her disabilities getting in the way.