What I use is ebag packing cubes:
http://www.amazon.com/eBags-Packing-Cub ... B005LXPSHG, I already had them for packing for business trips (they are meant to pack really well in a normal suitcases). So I reuse them for camping; those, and a mesh laundry bag for the 'need to launder' stuff.
It's hard to get a feel (from the pictures) how much each size bag holds. For me, the small = several socks/underwear (a weeks worth when traveling), the Medium = 2-3 shirts, depending how bulky they are. The large is 2 pair of jeans, or 1 pair of jeans and 2 shorts. Again, that's for me. everyone's clothing is obviously going to be different thickness or sizes; but that should give you a feel for how many and what sizes might work for you if you are going to order some. Of course, if you are going for a vintage look for everything, those bright colors might not give the right ambiance when showing off.
