I hunt out of a home made fiberglass and concreetpits

But we took the idea from onewe saw on a TV show

Look in the back of the DU magazine

If you plan on hunting out of it a lot
Comfort is a big thing
Try to make the top of it flush with the ground

Then put a slie back cover or some type of push thru cover
We used Plastic Broom type stuff
That we got from Cabela's


We wired ours with 110 v to power the sump pump
But the power also runs lights , cofffe pot and hot plate

If in a cold climate
A propane heater is nice also


John