LOL Very clever posting here folks - sounds like the RR stockholders have a great working relationship with the planning committee. You guys are off to a good start and your design is amazing for a first effort. Something to consider with switches that are easily accessible is using ground throws to operate them. It adds a 'hands on' feel that is nice. Sounds as if you will have good expanses of scenery which is somewhat rare in the 3 rail world.
The best advice as one poster (RDM) pointed out above: "most model railroads I see are overbuilt--especially three-rail ones. They all end up looking the same because they're all a jumble of the same common stuff." So many of our layouts DO end up looking much the same with so many common structures crammed into a limited space. Try to keep with the quality scenery thinking!