A carcass is a terrible thing to waste! I'd treat them the same as an old stewing hen. Crock pot 'till the meat falls off & put in casseroles. Take the bones & put them back in with some water, a few stewing ingredients (water to the top, salt, pepper corns, bay leaf, a few carrots & celery stalks, quartered onion, garlic, gogi berries, turkey tail mushrooms, etc.) & run it for 15-24 hours. Makes an unbelievable broth. Strain & add in your favorite stew or soup ingredients & cook. Or throw some pinto beans into the crock pot with the strained broth for some of the best beans you'll ever have. Venison bone broth doesn't turn out as well. But birds of all feathers (turkey most of all) are winners.
I couldn't imagine leaving a turkey carcass to rot. Turkey soup is one of my favorites. I wouldn't even bother hunting turkey if I couldn't make it. For meat, younger birds are the best. But for soup, those older birds can't be beat.
A family friend from China came over years back. She worked as a sort of live-in postpartum nurse for Chinese families all over the world using very traditional Chinese medicine & foods. She always had an eye on our backyard chickens and talked about how much she missed getting older birds to cook rather than the young ones we slaughter here in the US. Seriously -- if you haven't tried stewing your turkeys for broth, you're really missing out.