Yeah. I know the YTs that have been coming out of LJ have been monstrous...
I finally recalled the bag that my cousin had. It was the Sea Angler fish bag and I think it would be long enough for most species targeted via kayaks.
Sea Angler 65" x 20" Off Shore Fishing Bag
If there's enough demand, maybe the board sponsors will decide to carry it.
I agree that keeping the sight and smell of food away from wildlife is the probably the best course of action.