N Scale - Scenery Hides Staging
My layout is small, compared to some of my friends, at 10' X 14' in the shape of an L. It has staging behind the scenery with six tracks. The two mainline tracks are routed to the rear of the visible part of the layout to allow easier access to the industries' sidings for operation. N scale allowed me to get a fair amount of real estate in a small area without crowding.