Years ago I got a wood pallet from work and nailed it up in a tree where the branches forked apart...it lasted for several years before it finally fell apart!
A friend of mine took a roll of the small diameter bamboo sticks that were tied together and made a square wall/shooting blind around an old oak tree next to a food plot,then we cut out shooting windows,brushed in a bunch of cedar tree branches and it worked out great during Deer Season.