we are a building and electrical contractor and at first my thought was ...good idea but tons of work for a stand. Then I started going through the structural process...cross bracing is a must...10 feet high is plenty to base of platform. Why not make the poles part of your four corners? Build your blind within the four poles not on top. still bracing 1/2 way up would be required. Secure 2x6 through bolted into pole as a frame (or box beam) around four poles and place floor rafters with hangers 16 o.c..... if your poles still have the mounting bases attached they can be bolted to a sonotube , concrete poured and have threaded rod (5/8" min) and just bolt them to your poured sonotube 36" deep minimum...48" if you want to beat the frost...Last and most important item...brass bolt mech connection or weld or thermoweld a ground wire #6 copper from each pole without cutting the wire and connect to 2- 8' ground rods (5/8" ) $12.00 bucks each...so it runs as a complete circuit to the first ground rod then to the second ground rod...no breaks in the wire! Rods are driven straight down flush with ground...
Wow lots of work...what if this stand location is NG...hope you though of that