Now, for a more serious answer, while you recover from hip surgery. Here is what I suggest:

Fillet catch ASAP. Cut fillets into smaller pieces. In a gallon zipbag, prepare a marinade with equal parts lemon and lime juice. As an option, add any one of the following: Famous Dave's Georgia Mustard, italian dressing, ranch dressing. Mix well. Add any spices you may desire. Mix again. Add pieces to bag, and let marinate for a few hours.

This part is critical to avoid spoilage. Squeeze air from bag & seal. Place in a wet canvas or burlap bag. If you're in a canoe, suspend from a 10'-12' rope for cooling effect. If you're in camp, drop bag in deep water offshore (to protect from turtles,etc) and run rope to a tie off point on shore. You may not be able to reel it in, you may need to go out in canoe to retrieve it. It will keep 1/2 day or so, and the marinade will tenderize meat.

To cook it, I would wrap it in foil, and place in a bed of coals, to keep moisture in, so it doesn't dry out and become tough.

Hope this helps. ;)