I would put all the stuff you don't want to get wet into a small "dry bag." They really work
and would also float if you accidentally dropped the bag. Water
seems to find its way into zip-loc bags, which aren't even adequate for storing spices much less emergency equipment
. Vacuum bags can't be resealed, especially when you are floating in the gulfstream on a cooler after your boat
sinks and your expensive life raft doesn't inflate.