The Sims "Taco" holds my boots, waders and vest as well as giving you something to stand on when changing into or out of the waders. It breathes well to let things stay fresh and dry out. I have an extra gear bag with spare waders, fly boxes, flashlights, headlamps, first aid kit, wader repair kit, etc. (Don't forget spare batteries) This stuff is always stored in the car with a couple of rods.
On our recent 30 day trip I packed clothes in 2 1/2 gal, 1 gal. and 1qt Zip lock Bags. That way I did not mess up the whole suitcase digging out a change of clothes. In fact I did not even take a suitcase just 2 32 qt. storage containers. One for warm clothes and one for everyday stuff. Need a change of skivies and socks? Just grab a bag and head for the shower with fresh jeans and a shirt!