i've got some stands and umbrellas that fit into a couple of old cheap rubbish tripod bags i had lying around you know the wobbly $10 aluminim tripods that struggle to hold a point and shoot. turns out those nylon bags hold a flash stand with head and 33" umbrella attached so nothing to break down
then i have a bigger stand with C stand and 40" umbrella in bigger manfrotto tripod bag
I have also seen 1m long bags on ebay that claim to hold 3 stands but i like this setup as i can pick and choose but there is no breaking down of stands which is nice
backdrops however

thats another storey
also i find gorrilla pods make awesome standless flash supports if you have trees or poles around on location
so i keep a couple of them handy in my kit