Thanks guys, I had a quick play around in SCARM to see what i could come up with:
on Flickr
Although it is a copy of the track plan (to a point as I don't have room for the L shaped part) of the LA Junction I would hope I could achieve a different feel with the scenery. Along the back are a couple of generic modern buildings, not sure what they would be yet, but something that uses box cars, I like Jack Hills idea of a cardboard manufacturer, as that has box cars in and out.
I don't have room for staging so the cars would be staged on the left hand lead in track, there is room for 4-5 50' box cars and small engine. Each of the rear buildings have car spots for 3 cars, so plenty of switching.
The bottom right spur will be a lumber yard, I have few center beam flat cars that need a home and many hours spent wrapping the loads for them!
In the front will be a few non rail served bits, I want to put a in a firewood dealer as I have some logging trucks I spent a while building that need a home.