Howdy,
Alligator is pretty good....I expect it would work fine in Jambalaya or gumbo and as noted....it is good cut up in "nuggets", battered in a well seasoned batter and fried.....it, however, does not really taste like chicken.
Now as for rattlesnake, the best way to prepare one for frying is to cut the meat from the bones, much like removing the loin from a deer...that way there are no bones. Cut into pieces, it can be added to jambalaya, gumbo, soup, or battered and fried. It, too, does not taste like chicken.
Good luck, and don't be afraid to try new ways of cooking 'gator and other such critters.