On the simplex channel the rescue tech & helicopter were communicating to each other. The local responders were on Med. Ch. 10... I think also heard Eagle 1 with the local responders on this channel. They did contact Shenandoah Nat'l Park on 166.900 during the flight and asked for Rockingham's operational channel information.
It's my understanding that the park service will fly to any County/ Jurisdication that boarders the park. I think they will fly pretty much anywhere, but if the locality does not boarder the park there is more gov't. red tape & requests to go through and it's not an automatic thing.
Sorry it took so long to reply, I forget you have to go into the fourm profile to receive new messages by email.