The previous posts are a breakthrough for me! or my train of thought.
I have been to the Davidsonville "NIKE Missile Site" many times with "MY" pop for Blue Grass festivals (30 yrs ago?)and have seen ham fest's going on at the same time. I think that is where that repeater is. AA County Leo training facility there now as well I believe.
Speaking of hamfests, I see at least 2 coming up in MD. June 19th at Upperco and June 23-25 @ Timonium.