This may sound a little crazy, but how about something like starting at the lumber yard in Berezino, have to push through Berezino to the final objective in Nizhnoye. A running battle the whole way over the entire area? It would probably take a couple of hours to clear the mission knowing what insanity Sandman is capable of, but DAYUM what a battle!!!! Bodies everywhere, choppers burning, hell infront and behind you, no safe sanctuary. Add in a few random patrols moving around north of the mission area to make getting back in by car or bike more scary... Just a suggestion....
