since it's a garage, I'll give you a tip I've seen a few times...
Get a bunch of empty carboard boxes from Homedepot, fold them and tape them up, then stack them to make a wall of boxes (use a sharpie to mark them things like Clothes,Baby clothes, Bedroom, etc...) that way you can still open your garage and people won't see a room in there... just a wall of boxes...
Works everytime...