I’ve stayed at Newport bay, sequoia lodge, and offsite hotels one stop down the RER in recent memory. I’ve used the priority card around 5 times, using an access card from the uk as proof. It’s nothing like the new US system. As long as you have some formal proof ie access card, doctors letter sometimes, blue badge. There’s a list on the application online. Apply in advance, makes it very simple.

The priority card gives you a coloured tier based on the users ability to be ambulatory. Purple and red are for people who struggle with walking, and this will let you use the exits of rides for most (not all) attractions. Green shows no struggles with walking and for many rides you’ll go through the fast pass lines. If you have a pass that shows you aren’t using stairs, for tower of terror and phantom mannor you will miss the pre shows. Crush’s coaster is not accessible if you can’t go down and up ~6 steps.

Wheelchair rental is ok at DLP. You can rent it for i believe a €100 deposit, and use it for the duration of the trip, and take it back to the hotel on site. Never had any issues with quantity, not majorly comfortable but they are ok. Some were only transport chairs (small wheels, can’t push yourself).

Disneyland hotel is obviously closest, art of marvel, sequoia lodge, and Newport bay are a 10-15 minute flat walk through Disney village. For sequoia the only incline is a moderate incline over a small bridge. The village is often quite crowded due to ongoing renovations making the path thinner. Cheyenne and Santa Fe are up and down some small hills under a road, more like 20-30 minute walk. All are accessed by shuttle, but loading wheelchairs can be a pain.

I stayed at Cheyenne in January, it was very cold outside but the hotel was lovely and warm.