Thoughts Wanted: layout staging-interchange yard

[faraway]

...Do you have any thoughts on the actual track layout at the interchanges?

Gary, I am thinking about something like this:



The SP/ATSF (brown) come from the bridge, has at least a main and a siding for interchange, may be a stub and exits into the "off". Your RR (blue) connects to the interchange track and has at least one run around and leads to your layout. The other side of the door is similar in function.
You might want to have all tracks in direct access of the blue main line to have a better staging yard functionality. That needs modifications of the right brown switches. A stub track for a switcher, caboose etc. might be nice.