I like these sheet and odds and ends bags from Blue Performance a lot, but I hate drilling holes in our boats.
So I ordered these snap together fastener strips with adhesive backing to stick on the boat, and disks without adhesive to bolt the little mounting doodads the bags come with to.
Seems to work well, and the same hack can be used for mounting a bunch of different things.
The pics below show the details:
Here are the McMaster Carr part numbers: