I don’t think they’re super susceptible to bending in storage. I don’t think you want to be careless about it, but you’ve got plenty of flexibility in how you store them.
I have, for years, stored mine on little hangers I made out of scraps and attached to the underside of a heavy duty shelf. I spaced them out so there is a hanger every couple of feet and very close to each end. The goal was to have them be easily accessible while not taking up any othewise usable space.
I’ve never had a problem.