I' m usually on the ground when hunting bear. Just don' t fall asleep. Don' t move and keep your eyes and ears peeled. Bear can sneak up real quiet. There paws are like a rug.
If your calling it' s good to have another hunter and sit back to back so you can cover alot of ground with 2 sets of eyes without doing a lot of head movement.
Try to get into depression or at least have background that is consistent with your camo.
If your sillouette is sticking out in the wind that animal is going to see you and you' ll make it really easy for them to pick up your movements.