My Dh works in Laurel, he is closer to the Columbia side. But we live in Woodbine in Carroll County. We actually just moved here in December, and it's pretty wide open and you can keep chickens (I don't know about newer developments, but we can, and it was built in the 80s) There are goats, horses, and sheep around us but we are still close to a lot of things.
I don't know any CSA yet, I just moved and haven't had time to explore too much around here. I know there are a few places locally in Carroll County though.