Thanks, Wilcam 47. It might not be a bad idea to put up a 2X4 railing around the top. That would be handy to tie some camo. burlap to too if the doghouse was somewhere else. If 8 ft. 4X4's were used, that would get a seat height up to 9 and a half feet, or so. I think that if 10 ft. 4X4's were used, the platform frame should be made from 2X8's instead of 2X6's. That would be quite a bit stronger. Either way, the ground would have to be landscaped so that one leg wasn't in the air. The bag of gravel sounds good too.