I have had luck with calls ground hunting. In fact, I prefer calling on the ground to tree stands. I usually walk with no real "pace", walk, pause ... walk a few more steps ( when I get close to my sit). I may doe bleat or buck grunt, snap a few twigs, shake a young tree, then paw the ground with my feet. Walk to my sit, grunt a few more times and wait. If in 45 minutes or so nothing happens, I may give a few more grunts or soft doe bleats. I have had good luck that way and filled tags doing it.
Bob.