Grumpy Gourd-

Do you have a dehydrator?

I haven't used freeze-dried tuna, but have had great success home-dehydrating canned tuna salmon, as well as frozen mock crab, then later making them into salads and other dishes on the trail.

Canned chicken may turn out similarly.

I do recommend extra-careful packaging for fish. Another backpacker complained to me that her pack "smelled like cat food" when she carried dehydrated tuna. It seemed to me that tuna, and some other foods, dry into pieces with little points. These make tiny holes in plastic bags. I have better luck if I either use washed and dried mylar snack bags (like from popcorn, chips, etc.), or wrap the dried fish in some sort of paper, whether wax, plain writing paper, towel, brown paper bag, etc., and THEN put the closed up packet into a plastic bag. (Hint, the mylar bag is much easier...)

Regards,

CamperMom