If this drought continues, you should hunt in a blind over a good waterhole with a good decoy. Spend a few days scouting those units and you'll be able to see what waterholes they are using, set up a blind, natural or something like a double bull before season so they can get use to it and nail a monster. Stalking a Pronghorn with a bow in open country would be a huge challenge, especially during rut when the buck has all of his girlfriends with him.
Goatalopes can see 320 degrees out of 360, so the only thing they can't see is directly behind their head. Add to that 8X power eyes and you have a very difficult stalk a head of you.
When calling coyotes, more often than not they will circle on a target they are
coming into and approach from the downwind side. Presumably they do this in
order to align what they smell, with what they are hearing.
This means that you should always have your downwind side camouflaged and have
an open shooting lane. If the area is heavily covered the coyote could come in
take a look and be gone, with you none the wiser.