They can go under the seat in front of you, if they fit there. The overhead compartments are bigger. And there will be people to help lift it up overhead if needed, if you can't with your wrist.

I'm thinking with this, I can try to get everything in the middle size one, if it doesn't work, I'll have to use the bigger one. But I'd have options, and the whole set is only $30. The back pack thingy is $20.
Becky