Is there a way to know if a gobbler is on the ground gobbling with a hen versus if he is on the ground and just walking and gobbling without a hen?
Only if you have a visual. Without a visual it's just speculation.
When they are a distance away I have a hard time telling if they are on the roost or on the ground
Yeah but you'll need the new wild game innovations Gobbleometer and boy are those things pricy $$$
Jk, if it feels like they are intermittent pity gobbles I usually assume he's got company but if he's burning the woods down choking himself on gobbles I'll assume he's lonely