As it sometimes takes me 4-6 hours untill I can get home and was the stuff, all the gear in well marinated.
Actually well marinated is a good thing. If you aren't able to rinse your gear, you would prefer it to remain wet so that salt crystals don't form. I agree on the sand and your invention is a good idea. You could then, place that on top of all your gear when soaking it in the bin to keep it from floating (placing lead on top).
Otter