A good, sitting on your bottom, height gun rest rest of some sort. Be it sticks, bipod or whatever, your shot percentage will go up. I'd like something just to keep my gun out of the dirt when calling or trying to stay very, very still.
Yotes are wiley lil guys who will routinely head down wind of the sound so they can have a clue before they arrive, or bust out and never be seen in case they stumble onto a mtn lion taking a deer or the like. Or you calling them. That said, if possible, make your downwind position very open regarding your view.
You can hunt coyotes at night, so spot lighting is fine as long as your away from the truck. Same for moutain lions, bobcats and any other varmint animal typically. Check your local regs, I'm in Oregon. Bobcats and mtn Lions require tags beyond your hunting license. Coyotes, no worries there.
I just missed out on a coyote hunt deep in SE oregon last week. Work is too busy and my stepdad had a calamity of auto failures and couldn't make it either. I need to call my BIL and see what the scoop was. When we miss the trip, my BIL and his uncle usually clean house and get 10 to 20 yotes in 3-4 days.
But oh man, those two hunt, and hunt, and hunt, and hunt. They hunt so much that I get exhausted and fall asleep resting against the sagebrush only to wake hearing gunfire.
One last tidbit. If the yote is not sure where you are and you have them close enough to shoot, give a yelp or light whistle. They frequently stop running so they can listen and home in on the location of the possible mouse or rabbit. Usually for a couple seconds. If they don't see you, if they do, they scoot quickly.
Hope this helps,
jeepmor