 If you go north to Democracy, you can get back to the spur. If you go south, work your way to River Road as the next chance to rejoin the Beltway. So rejoining the Beltway from the 270 spur outer loop as well as River Road are your two choices. You may want to work early. There is already congestion on the outer loop after 355 trying to get to Old Georgetown Road in a single lane.