I think you need to have a mind set to hunt coyotes in heavy cover, it is my favorite way to hunt them. There isn't a bigger rush than a coyote at your shoelaces. It doesn't have to be forests either, waist to shoulder high sage, russian olives or willow bottoms up here or thick manzanitas or greasewood down south. After doing this for a long time you look at a spot and almost tell which way a coyote is coming from.
If it is thick I carry a combo gun or drilling, never know when you'll get one staring at you from out of shotgun range. In clearing in the cover where shots can be longer I will carry a rifle. All my guns are equipped with 1-4 or 1.5-6 scope with large FOV's to be able to track coyotes through the brush and still see an opening ahead of them for the shot.
Calls, I use e-calls almost exclusively in cover, hand calls involve too much movement and using a hand call will focus a coyote directly on me and at close range it doesn't give much time to shoot and takes one hand away from the gun. Coyotes focus so much on the location of the sound that I've set a caller in a bush with a decoy on the another branch of the bush and have had a coyote jump up in the bush and grab the caller and ignore the decoy, has happened twice to me. I like a caller that has sound coming out of the call in one direction(no speaker in the rear no rotating speaker). I can focus the sound to where I want to see the coyote and find they mostly come strait in from the way the caller is facing even circling to get to that point.. As far as sounds go I like small sounds in heavy cover baby cottontail, vole/shrew/mouse, birds, kittens.
Stands like this aren't uncommon in heavy cover, A minute into the stand a coyote comes in [beeep] bent for elections and I roll him with the shotgun, reload and keep calling two more come in and I roll one with the shotgun too far back up he comes charging straight at me and I kill him at six feet with the rifle barrel I lay my gun on the chair and walk out to the caller and here comes number four. Fun stuff and everything is under 30 yards.
Camo, as far as it isn't dark camo most is ok with me, I have some Natgear, cheap walmart, and a couple others, if its cool I'll put on a gillie jacket but if it is hot I roll up my sleeves, leave the gloves in the truck and just enough face mask to cover my white beard, It doesn't seem to make much difference as to what camo I have on .
I like a three leg folding chair rather than sitting on the ground , I can see farther into the brush and don't worry too much whether ther is a bush in front of me as they will get shot befor they get to it or after they pass it, I dont get back in a hidy-hole but do sit with a bush or tree behind me as I like to have a least a 180 degree field of vision and to swing the gun.