I have not used the flying goose decoy but I have used Mojo decoys with ducks and doves. The Mojo decoys work great. The Carry-Lite looks like a good deal. I would try it.
I was playing around and put a duck decoy out while dove hunting. The duck decoy would flare doves. As far as putting the Carry-Lite in a height above the ground, you could probably put it at any height. Behind your spread, I would probably have it higher, but in the landing zones inside your spread just a few feet off the ground would be good.
Sounds like a fun hunt.