I made two of these easy to assemble portable blinds with fold-down fronts last summer. Unfortunately since I sold my pickup and bought a Honda Ridgeline they are too long for my box. I could likely be coaxed into selling them. IMO, way better than a bale blind...
http://www.outdoorsmenforum.ca/showthread.php?t=348708
And I am driving down to Calgary next week, so we could likely meet up if you wanted them.