I don't blame you for being over-protective. I would probably be carrying Babybear around in a knapsack all the time if it were me.
I agree with SJK1113. Just take it slow. He has to learn to walk again and he has to build up his muscles and coordination. Poor little guy has been thru so much, no wonder you want to protect him. But they are smart little buggers and it doesn't take long to figure out "why should I do the work if my mommy will do it for me?" I wish you luck, and don't worry too much, Babybear has proven he's a fighter and a lot tougher than you think. Hugs to him for being such a brave little Babybear.