THUNDERBAY LOCK DOWN HUNTING BLIND. ThunderBay 2 Person Hunting Blind. THUNDERBAY 5-Side Hunting Blind. THUNDERBAY Pop Up Portable 6 Person Side-by-Side Hunting Blind. ADEQUATE CAPACITY: 3 man ground blind with a 81 x 81 set up size and 66" height, footprint: 72.5"x72.5".