Logistics for a sagged multi-day tour

[Tuckervill]

I like these bags from LL Bean, although I'm kicking myself for not buying one when I was in Maine last year. http://www.llbean.com/webapp/wcs/sto...t=4525-tn&np=Y

They come in a few different sizes.

eta: I second the foam ear plugs! Can't sleep without them when I share a hotel room with my dad or husband! If I were going, I'd bring a tent, too. If it were raining, I'd even set it up inside the gym so I could have my privacy!
Karen

I'm attempting to pack for a 5-day ride. It is sagged, so I will be loading my camping stuff and clothes on a van as we go from town to town. Most of my junk will be in a big rolling duffel bag. I'm planning to put each day's clothes into a ziploc bag and keep organized that way as much as possible.

But I'm trying to figure out what kind of bag I should take to haul my after-ride clothes and bathroom stuff to the buildings with the showers, etc.

I haven't camped in years, and don't have any idea what would be semi-waterproof and handy.

Anybody who's done RAGBRAI, BRAG, etc have any suggestions?