Go to REI and see if they have any rolling duffles on closeout (otherwise they are expensive). They have some absolute bulletproof rolling duffles that have survived 3 ragbrai’s for me and two other 7 day biking trips plus my kid’s summer in Ireland. The ugliest color is best – they don’t sell and they are easily spotted in the bag piles.
I second the REI suggestion. They’re not the cheapest, but they have a lifetime guarantee on all their gear. I took a well-used two year old backpack to them when the zipper started to fail, and they replaced it with no hassle whatsoever. My wife and I have REI duffels we use for RAGBRAI, and they’re quite solid.
I use a Hockey gear bag. It’s good for the bulky stuff:
Tent, sleeping bag, mattress, pillow, easy chair. I have
a smaller Sierra for clothing and other gear. Remember ~
pack it like it’s going to get tossed!
The bigger your bag, the more stuff you’ll pack into it!!! You should be able to pick your bag up, above your head. If you can’t, it’s too heavy!!!! Remember to show a little compassion to the luggage crew who handle your bags twice each day!!!!