Spot, that’s pretty darn close. The wind would have to be just right. As to a popup blind and heater, my first attempts were that way, but at a greater distance while using a rifle. Didn’t take long to realize it was just too difficult and not productive. Cold, cramps from a lack of leg room, and means of resting and being comfortable topped the list. As well, you can’t sit up and watch all night waiting for a coyote to show up. Sitting for hours and hours, trying to keep warm and with leg cramps was just too much. Coyotes are unpredictable and can come any time of the day or night, but probably 98% of coyote visits at my bait site are at night. If they are coming at a predictable time in daylight hours, you might be able to get a shot or two with the shotgun, but again, that’s darn close considering squirrely wind.
If hunting at night you would need some means of knowing when a coyote is on the bait. Shinning a red light around all the time is bound to scare them off, particularly at shotgun range. Most of us use battery operated driveway alerts. Then there’s the need for being able to see at night to shoot. That resulted in me going with night vision.
Not saying a blind won’t work, but just so you know, it’s a pretty hard way to go. I could perhaps see a heated tent with comfortable bunk and sleeping bag working better, but at a longer distance, and with rifle and night vision. Another thought might be a small camper with a window for shooting, but again at a longer distance. I have considered building a portable hunting shack on a small utility trailer I have. Another idea is hunting from a barn or barn loft, but that could be pretty cold. Just throwing out ideas.