Those slip-resistant overshoes might work, but I was really hoping to find alternate cheap, felt-soled shoes that would fit multiple foot sizes, like those Cabelas do, but from a mfg who would sell to the shop wholesale. That way I could get away with getting two each in two sizes for each of our guides and be good to go at a low price. Having something that people have to put on and take off sort of defeats the purpose, since that's already what we have them do when they show up with studded boots.

John: I had that waffle plastic in my boat for the first week I owned it and then threw it away. Hated it --it was perfect for trapping sand/gravel and losing flies in. At any rate, they only make that to fit the rectangular bottom of the boat, not the raised false floors that get shredded by people shuffling their feet in studs.