Well, That is a lot of feedback!! I am back at the helm after doing some plumbing on a hundred year-old sink and 2 1/2 hours mowing (walking not riding) at my dad's empty house. Then looking at what we need to remove an ancient gas heater at our older daughter's house so they can sell and finally move into Dad's house. Good think I am only working 3 days a week, but the paychecks are slim. 
I appreciate all the thoughts. First, yes the yard has gotten out of hand for my needs. I want to just park some cars for making up trains. For the prototype, that track goes from Parsons up a valley, over a lower ridge, then down into Elkins. I'm not interested in replicating anything in Elkins, it is just off in the distant imagination. 
The cassette idea we talked about months ago sounds like a better idea now that we are exploring other ideas. And to that, John, I am sorry you broke the connector to a tender. Good thing Mr Muffin isn't far away. A passing track on that inner track to the lower return loop is good which we were going to do in the little room. Putting in a place to but the cassettes to the layout like the yellow track that goes off the layout looks like the place. Yes, I like Dave's idea of the sockets, and seems to me I saw that somewhere whether it was to cassettes or a lift out bridge, I don't recall. Liftoff scenery is good too. I made a whole hill with a farm on it to cover a hidden turnback loop on an HO layout once. It worked nicely.
Yes, I think that the aisles need to be large. (Brian told me a funny story about narrow aisles on someone's layout) Who knows, maybe everyone in Butler will want to come visit the layout someday! Har-har-hardy-har-har!!
As to Brian's drawing this morning, I do like where the switches are on the front side of the loop and not the back side. I was going to mention that a few days ago, but forgot. I don't know how track arrangements would work out for the other. I do intend to make that a swing out section, but don't want to have to be swinging it out all the time when a car fouls a switch.
If some of this doesn't make sense, please just ask. I got interrupted a few times while typing. Thank you everyone again!!
