Right near me, there's a secure radar and microwave relay compound. I was in the facility years ago and it's dialed. They have their own water system with filtration and uv sterilization, something like 10,000 gal storeage on site. I'd add rain collection.
It's on a steep sided ridge with approx. 5 acres behind 16' of concertina wire. ~15,000sq plus an enclosed (and gloriously stocked I might add) shop, the highest point in the building, not counting the towers is some 4stories above the ridgeline. Each side is kept clear and the heavy trees on each side along the ridge itself hide pretty tangled and rugged land, tough for shamblers to get thru. I imagine a series of simple rope bridges couple be extended out into the treeline to make crowd clearing easier.
Oh yeah, no first floor glass of any kind that I can remembern
Neat joint, I call done but there's room for a few cool people to come.....just stay outta my stash of Cap't Crunch and you'll be ok.....