I have a couple of spots I use ground blinds only because of lack of good trees. I didn't want to leave my double bull out for long periods of time because of the close proximity of some houses. I was afraid of someone with sticky fingers. So I built them out of Cattle Panels and steel post's. I also bought some cheap flat black cloth at walmart and covered the inside like a double bull. It helps with not getting back lighted. I actually got the idea from a Monster Bucks Video where Bill was hunting the Perlitz Ranch I believe and was on crutches. I covered them with Grass hay I rolled out of a round bale and attached it with some plastic zip ties. I check them from time to time and if they need some upkeep I fix it and get out. They almost resemble a big hay bale.