Here is one I built for my 16' PolarKraft.
I used 1" square aluminum tubing with 1/8" thick inner wall. I attached it to the boat using standard bimini top parts that can be ordered/purchased from any boating supply place. I can install it on the boat in five minutes and raise/lower it in 10 seconds. As for the camo, you need to look at where you will be hunting with it. If hunting around grassy marshes & such, the Avery Grass mats work nicely. Four on either side (attached to the blind using zip ties, gear grabbers, etc) and one on the bow. This will make it wrap around the motor nicely. You can also order material (cloth, netting, etc) and mount it on there.
"I'll start spending less time with my dog and more with my wife when she starts fetching ducks for me"