RE: 3 person blind
With three people shooting, I would think the biggest problem would be who gets the first shot! That being said, I think the easiest way to pick a blind that will make you happy is to make sure that each person has enough room to swivel around in their seat without bumping into one another. If you live by a Cabelas or BassPro, you can go see some set up and it should be easy to decide. You can always figure out which size you want and then search for one that's cheaper.