In addition to what everyone else has said I wanted to point you in the direction of a travel piece I wrote for the website a few months back. One huge thing I learned speaking with the wheelchair travelers was just because somewhere says
they are handicapped accessible, doesn't exactly mean they are! For example, f they send you an email confirmation saying it is, be sure to print that and bring it with you as proof.
Most importantly... ask questions! Do your homework, call the hotel, airline company, talk to other individuals living with paralysis or a disability (which you have clearly already done but posting here in the community!
Here's the link
to the piece if you would like to read it over. There is also tips from the wheelchairs users
to keep in mind and checklist from a physician about how to stay healthy on the road
All the best and safe and happy travels! Be sure to let us know how it goes!