I have a bunch of turkeys and crabapples in SE MN and they work well together. The turkeys will get some, but there will be plenty left for the deer. Some of the varieties of crabapples stick on the tree all year and are of no benefit to deer since they can't be reached. The turkeys will fly up to grab a few to eat and knock down other apples in the process.
Turkeys, pheasants and grouse will all eat small crabapples like red splendor crabapples, but the deer will as well. I think a variety of crabapples would be a good addition to a full size apple orchard whether you have a bunch of turkeys or not.