Portable or permanent?
I make and use portable blinds out of several things. I have one blind, portable, that I use in the marsh made out of a tennis net that I got from the rec dept of the city years ago that had a few holes in it. I attached 5 1x1 inch poles/stakes in the net for support and wove phragmites (bull rush) in the net. I roll it up and wrap a bungee cord around it for portability. It will hunt two persons easily. It is about 25 feet long.
I also made a portable blind that I use in the wheat fields up in Canada. It's made out of ten pieces of 10' emt conduit that I bent into "n" shapes with a conduit bender, 3 1/2 ft. tall. I secured some mesh panels that I got from AeroOutdoors to the conduit with plastic ties and hooked each two panels together with large plastic ties so as to hinge. The 5 sets allow me to set up the blind with 4 panels across the front, one on each end and 4 across the back. The legs are slipped over stakes that I made by welding two spikes together at the heads with a washer welded between. This allows the panels to stand up. I attached maleable wire to the mesh where I place whatever natural camo I wish to use. I normally use willow bushes limbs. I also just made a 25 foot length of fishing net where I attached broom straw that I can drape/bungee around the panels which will look more like wheat straw for this year's trip up to Canada. We can hunt 3 comfortably, 4 squeezed together. 3 sets of panels would be just right for 1 person.
Click to enlarge
EMT Conduit Blind with willows attached