yeah, i like totes for that very reason, we have most of our seasonal decoration items in totes and stored/stacked in the attic. Empty space I am not too worried about, but for the sleeping bags I am concerned about if the regular tote will keep enough moisture out so the bag won't be damp, moldy, etc when it is time to use them.

I'd really like to get the bulky sleeping bags out of the house, no room in any closets for them, a big reason why they are laying about the house, usually i let them lay out on the spare bed outside their stuff sacks, keeping them dry and lofty for the next use. Unfortunately, that doesn't work well when you have company come in from out of town.