We use shacks for clients but rarely are we in them ourselves, but if someone goes in or just gets chilly we do this:
I carry a 2' x4' piece of carpeted plywood with us it has 2" holes drilled in each corner.
into each hole we slide a 6 foot 2" pole. we wrap a tarp around them with a side loose and lay a piece of plywood across the top with a gap at one side for venting, not that the tarp makes it air tight mind ya!
Sit on a bucket, change your socks and clothes if needs be and then face a propane heater ( screws onto the 20# bottle) into the 'shower' and you are toasty in a minute.
don't over do it cause you can build up a sweat in there fast, and that is spelled p-n-e-u-m-o-n-i-a.
In all honesty we like shanties but are never that cold to go in one. I have them scattered all over the place and each year I say we should build more, and the guys yell, WHY?!
if it's 40 below F and blowing out I guess we just don't fish, bunch of sissies.
