Track plan help?

[iis612]

I am not even sure that I am posting this in the right place...
Here is the track plan that I am working on so far...

The red lines indicate a scenic divider (i.e. backdrop) On the top is the staging area. On the left side you can see the turntable sitting, all alone, that is where my yard will be. Obviously more needs to be done to make this a workable plan. I need to add some crossovers, a yard, ad infinitum.
If the resident planning gurus could take a peak at this and give me their thoughts, it would be most appreciated.
Crud, the dimensions don't show on the picture. The grid is in 3" increments.

Thanks,
Matt

Here is a slightly more useful pic