ive heard you guys discuss this method in the past but ive never done it myself. we found a method that works for us so its hard to stray from that.

we basecamp, so its not as big of an issue of keeping fillets.

the method we use is 4 nylon bags, they were designed as sand holders for pop up canopy legs. for the trip in, they serve as wraps for the pan/kettle/tongs so keep the blackened ash/sharp edges from touching anything.

once we are at our basecamp, one bag is filled with rocks. the walleye fillets are put inside a plastic sandwich bag with a twist tie. the lake trout fillets are put in a brine of salt and lemon juice. the fillets are thrown in another nylon bag. both bags are hooked to a carabiner on the end of a 15 ft piece of paracord. they are sunk off of steep dropoff of the island we stay on. the fillets soak below the thermocline for as long as we need them. never had any go bad this way.