In the case of a Trainer that doesn't require you to glue the two wing halfes together per the instructions, you may want to go ahead & leave it the way it is. This will enable you to pop it apart for storage in a closet or something. Hot garages will wrinkle the covering on your planes. It not a real big deal to iron them back tight but if you can keep them in a more controled temp they won't do that as much.

I have two Trainers that don't require glue on the wings they go together with a wing joiner & 4 screws. I haven't had a problem with them yet, & they got a lot of abuse when they were the only planes I was flying!