For maximum penetration apply direct from the molten pot, apply cold layers later to build the surface resistance. Never do anything which offers to totally waterproof if the outer surface is impermeable your feet are going to get real cold. For spring rendezvous, barefoot is absolutely correct. Keep your powder dry and your feet warm. Authenticty is nice and I believe in it.
Squishy moccasins sounds kinda nasty.
Sure would appreciate hearing how you deal with it.