A halibut recipe, but would probably be good with trout too, and could do it over a fire. Dice some tomatoes, red and yellow peppers, lime, mix with some olive oil. Could add a little onion and garlic, diced peppers if you like heat (or even better, some canned chipotle peppers, diced up fine). A little white wine if you have it...not too much, don't want it to watery.
Put chunks of fish in double wrapped foil ... could be a filet, or could be a whole fish if thin. Add a few spoonfuls of the mix, seal it up tight. Put on the coals to cook slowly, low heat. Don't over cook it! Better a little under done than over done.
Do up a little cold salsa to put on top once cooked....diced purple onion, mango, avocado, cilantro.
Substitute in whatever you have, for both the packets and the salsa.
Fish Vera Cruz style, muy bueno amigos. Camping food to the next level.