i've done a few. Working on mine right now but it's a one room building in the woods with a big picture window over looking the same. In a basement I'd go with lighting and art work that inspires the spirit. Make it comfortable. A fireplace is great. Gas is possible if you provide an outside air intake. Nothing like a warm room nap to bring on sweet dreams of great hunting trips to come.
Post covers? Sounds like you know more than your letting on with that lingo.

Some very classy one's out there. Pad the carpet. It aint popular. Insist on it. It will mean taking care of any moister problems first. I've used a product called Duralok. Turns a concrete floor into a wood surface.
Good naping!