So do you!? 
I have a garage which is fine but I like things to be super organsied. I would love to get all these things off the floor and onto the walls so I can also use the garage to store my own crap!
Also I'm not sure if the garage is totally dry and might get a bit damp in winter - anyway of weather proofing carseats? I'm thinking along the lines of similar things you can get to go over bikes and scooters?
Any tips much appreciated!