EveDallas
It looks like we will be there at the same time! A mother son trip for us too! I am sorry to hear your son broke his leg. I hope he is not in too much pain.
I went to Disney last year 6 weeks after Achilles tendon reconstruction and was in a walking boot only allowed to touch the foot down for stability. So sorry I can not answer your question about room on rides for his cast. But I can share some things about my trip after surgery.
First off we must remember he is a spry young kid! I am an old falling apart woman LOL (body just doesn't do the same at 49 as it does when you are a kid) For rides one big challenge I had was right loading rides. It was my right Achilles that I had surgery on so stepping up with the right leg was basically impossible. It seemed about half of the rides were right loading. The first week of the trip it was just me and my son. The second well my hubby joined us. So he was able to help me more. I was more tired during this trip and once my hubby arrived, I would send him and my son out and I would sleep in. I did have some swelling troubles but his leg will be up all the time so that should help.
So many people thought we should cancel the trip. I had to postpone it from the first week of June to the first week of July, that was bad enough. There was no way I was gonna cancel it. Even though I had to skip some rides I was just happy to be in Disney!
Take things slow and let your son decide the pace. Luckily you have a few weeks to get past the really painful days (basing that on your signature) Is it possible to add any time to your trip. If so I would consider it. That way you can take it slower and still see/do what you wish.
BTW I assume you are in Dallas or the surrounding area. I am too! Are you staying at the Pop? (again basing that on your signature) That is where we will be too! Maybe we will run into each other. Hopefully not literately LOL I will again be in a boot and on an
ECV. I'm dealing with some tendon inflammation so my Dr wants me booted for the trip.