jrista, now you got that off your chest, you'll feel better. I picked up one at Canadian Tire that is about 4 feet square on the base and sits about 5 feet high.... It is sitting out in the yard with a comfortable folding chair in it... and I must also confess that there is a long extension cord and a small space heater.... takes the edge off of things when you are shooting below -10.... and it is also within WiFi range of the house... (Roughing it is for amateurs)... I was sitting in it on the weekend trying to catch chickadees in flight (DARN THAT'S HARD!!!) and this lovely lady ran through the yard..
I looked for that chair and found one at Canadian Tire that looks the same, around $100. What's your opinion of that particular chair and is there anything else that might be preferable? That's better than the open lawn chair that I parked at "my" pond during the summer (actually my acreage backs onto county reserve so technically it's not "my" pond (another confession).
I do pretty much the same thing...I have a little space heater in mine on the cold days, too. Actually, if you put small stones on the bottom edge of the tent, and zip up tight around the lens, it actually holds heat in pretty darn well, even when the temperature is -10.
As for the Chickadees in flight, you should get Alan Murphy's eBooks. He has some good setup tricks in there that helps a LOT. All the best songbird/passerine BIF shots are setups...it's pretty much the only way to do it. The trick is getting them to land a short way away from "the treat"...seed, berries, suet, whatever...so that they will make that short little "flight" between the initial perch and their goal in a known spot. Then, you basically just point your lens towards one spot, leave it there, and fire away the moment the bird looks like it's going to take off from that initial perch.
Of course, that doesn't necessarily mean you'll get any shots. I have yet to create a setup where birds will land first on my special perch, then fly to the treat bar... They always seem to find a more amenable perch from which they launch their attack on the food, so I don't have any passerine flight shots I consider keepers yet. I think part of my problem is space...I only have a quarter acre of land, and everything is pretty tight and close. I want to give some setups out at the nearby state parks a try, see of I can lure some ground fowl and some passerines into a handy little setup and get some better shots.