and I pushed my mom in a wheelchair for about 5 years. She never weighed more than 120 pounds. She used a walker when at home (I was there when she was on the move), but when we went outside we always used a wheelchair. She could fall easily; so, we didn't take a chance. I was her caretaker 24/7 and without the wheelchair we wouldn't be able to even take a vacation. I really enjoyed those trips and I think about them often, now. My mom passed in July this year.
Anyway, I managed at Disney World. We went a few times with my mom. First, I suggest buying a lightweight portable wheelchair. Our wheelchair weighed 15 pounds. We did a rental once and the wheelchair weighed 35 pounds. The rental one did not fit in our trunk. I had a little trouble with the heavier wheelchair, but I managed. We were using it for my MIL; she weighed about 170 pounds. At that time I could alternate with my hubby pushing it. We did it, but I will admit that was harder. You can get a lightweight wheelchair from $99 to $200 depending on the brand and how much it weighs. If you try to rent I would make sure they carry the lightweight ones. Depending on your length of stay it could be cheaper to buy one. It may help with other tasks back home, too if you buy one, now.
Our plan was to alternate rides, shows, parades, and eats. This worked very well for us. If you can rest in the parks, here and there it's a great help. Be aware there are some rides with alternate queues for wheelchairs. You will be able to use handicap areas for the parades. Save going on the thrill rides and such when your parents are back at the resort.
I really enjoyed the smile on my mom's face when a character in a parade would approach her and shake her hand or whatever. I have some great pictures of her at Disney World. I will treasure those pictures, now. Somehow, I found the strength to get through it all. I did sleep well every night, too pushing a wheelchair. I did not have relief, either. My hubby was on a
scooter all the time.
My mom accomplished Soarin' when she was 89 years old. She went on Buzz Lightyear and Toy Story Mania, too. I loved every moment with her. Disney World is my best choice for a vacation.
Please under no circumstances complain in front of your mom about pushing the wheelchair no matter how hard it can get. Also, make sure your dad doesn't get exhausted doing it. Be aware they will not be able to go on all the rides in a wheelchair. If you want to do a thrill ride and your dad will stay with your mom, then go for it. Don't make your mom feel like she is a burden. Don't make your parents feel they have to stay in their room all day, either. If they are morning people enjoy that time with them at the parks. Then, let them rest at the resort in the afternoon after a lunch with you. You can use that time for the thrill rides. In the evening you can go back together. It's not that bad going back and forth to the parks.
If you are staying on site and using a wheelchair you will get first access to Disney transportation. You board first, but please note you depart last.
Please enjoy your time with your parents there. I wish I could have another trip with my mom, now.