Hi Kevin,
The woods track is just a spur that feeds the loading area in the n/w corner of the parking lot. It and the north yard are never considered main line trackage regardless of switch position. Here's how you reach the woods track with a locomotive or railcar:
* Switch #1 - You are working south on the original mainline and diverge into the north yard spur at the mainline switch. You will see a red target indicating that the switch is set for you to proceed into the yard.
* Switch #2 - The next switch takes you off of the main stem of the yard track the feeds bay 1 and the run through track. Throwing this switch (shows red) gives you access to the rest of the yard.
* Switch #3 - This switch gives you the choice of accessing bay 2 or 3 of the car barn. If set for bay 3 it will show red.
* Switch #4 - The last switch which comes off the bay 3 lead. When it is lined for the Woods Track, it will display a red aspect.
As you can see, every one of the switch stand targets will show a red aspect when they are all lined for the engine reach the Woods Track.
Hope this explains the set up. The best way to understand all the switches is to see them in person, we hope you can visit Sheepscot sometime for a tour.