On our land, we have enclosed deer stands which are about 5 ft. in diameter by 6 ft. tall with slotted, windowed openings.

When it is cold out, we use small propane heaters inside. We've got Black Cats...and Mr. Buddys. I *MUCH* prefer a Mr. Buddy, if I want to be warm without having to practically sit on top of the unit.

My 2 cents.

Harley