How to dry/hang stuff inside a camper shell?

Any ideas on how to hang wet suit and towels etc inside a campershell @roof height? I have bungee straps across the width of the truck bed (@ bed height). Needless to say, the wet suit and towel seems to wet the floor and then sweeping it all up.
Any ideas without drilling holes into the camper shell? Contact cement and some cloth hangers, maybe? let me know how you have solved this issue.

 

I put this up elsewhere, but its a cheap fix for the meantime.

 

I've used this bar for several years now without fail. Just be careful when cranking it tight against the sides of your cap, it will crack it.... Ask me how I know

 

Thanks for the link! the above link has redirect issues, I looked up based on your suggestion HF:

 

If you have a roof rack you can take advantage of the bolts that protrude thru the roof shell and make a system using wire rope. Got pics in build thread.

 

Adjustable shower curtain rods have worked for me. I store fishing rods on top of them.