I'm completely to all this, so I just have my own current personal experience to tell you. I have a broody silkie hen, and I found an abandoned clutch of turkey eggs where we mowed. The hen wouldn't come back after a couple days, so I thought I would conduct my own "turkey experiment"! I put the turkey eggs under "Mama Chicken", and thought What The Heck! What could it hurt right?
Just today I found one of the eggs is hatching! I lift her up every morning and check the eggs, and today one of the eggs had a beak poking through! Tonight I can hear the turkey chirping from inside the egg and he's making his way out. It's so amazing! I don't know what to do next (which is why I logged on tonight with my own questions), but I thought I would tell you my experience when I saw your post. Good luck!