i am goin with the trailer blind next time. really cool concept and easy enough to build. i plan on makin mine a legal trailer, not just some wheels to get around the ranch.
if yer talkin permanent, whats pictured below in a corrupt file will get the job done.
on a permanent..make sure the legs go to the roof. bury the legs 1/3 in the ground...er 2 55gallon drums with cement buried in the ground(saw this somewhere cant wait to try it, think i'll drill a couple holes in each foot and run re-bar through before pouring concrete.)