My DD has cerebral palsy and is not able to stand or walk. Depending on her muscle tone, she can range from being a rag doll to being a Barbie doll (with knees that don't bend and hips that are tight). So, she may not be the easiest to lift on. My DD can't use her legs to keep in place - once she' excited, they are usually straight out in front of her like a Barbie doll with knees that don't bend well.
She has not been on Rock N Roller Coaster, Expedition Everest, Big Thunder Mountain or Space Mountain, bust she has been on everything else. The only ride I would not let her ride again is Primeval Whirl because you get whipped around too much.
She loved Tower of Terror, but it was a workout for us to hold her down. The last time we rode, they loaded all the other guests, then us and the second row was what was left for us. We said we could not get her in there, so waited for the next elevator. It is MUCH easier to get into the front seat like Bill mentioned.
Here are 2 picture montages of Soarin':
It is one of the easiest transfers. You can park the wheelchair where ever you want in relation to the seat. A CM will move it after you are in your seats. The seat is about the same height as my DD's wheelchair. You have pretty quite a bit of time to transfer - we've never felt rushed.
It is a very gentle ride with slow gentle movements. The seat is also slightly reclined during the ride, which makes it more secure.
Here's a picture of the Test Track Seat Belt check area, which is where guests using wheelchairs can board.
The regular boarding area involves a step down to the seat of the car. There is an alternate boarding area where you can make a level transfer from the wheelchair parked right next to the ride car. A bit like transferring to a bathtub (a high bathtub).
Getting in and out of the car at that point is a bit like getting in/out of a bathtub with a high side. In the picture, you can see that the side of the ride car is about at the height of the CM's knees, so a pretty high step. The top of it was roughly level with the seat of my daughter's wheelchair - about 22-24 inches high.
You need to either sit on the side and swing the legs over and then sort of 'shimmy' down or step over the side (which you can see from the picture is rather high). Getting in and out is not graceful (at least for us) and I am glad that not too many people are able to see us. Maybe not graceful or really easy, but it works.
People with wheelchairs need to come back to that area to get off since the wheelchair will be left there. People without wheelchairs can get off at the 'regular' spot.
To get to that spot involves asking the CM at the time that you are asked how many are in your party. The seat belt check point is at a higher part of the track, so getting there involves a trip up a set of stairs with a CM (one flight of stairs, a landing, then another flight of stairs). There is also a small elevator big enough to carry one wheelchair or
ECV. When getting off the ride, you have to reverse those steps to get to the exit.
Test Track is one of my DD's favorite rides. We've been on it many times and have never felt rushed. They will allow you to park the wheelchair where ever you need to and the CM will move it out of the way after you are in.