If possible, store the cases separate from the camera. Cameras stored in leather cases seem to provide an ideal environment for fungus growth.
The plastic bins work well, and if you can get it, toss some silica gel packs into each bin. Don't store in the basement, unless you have a dry basement or a dehumidifier. And don't store them in the garage (there might be too much dampness). I guess if you're in a very arid climate, then the risk of fungus lessens.
A dry storage place of course is best. By the way, that "JUNK" comment hurt, didn't it?