My girlfriend's father got an older Circa 70's camper and we brought it out in the woods and painted it green and sealed it up and use that for our blind.
Most of the time we will stalk or I will sit on the ground and he will drive the deer. He has a few treestands but it gets WAY too cold up in them. I'm more of a ground person anyways I like knowing what is around me and his enclosed treestands do not make it easy to hear and then the squirrels like to drop acorns on the tub top so it gets really loud.