Hi Trvlingheart, Sounds like a good plan putting Beghera on the track first, that's what I would do also. She will be up to speed before the others join and showing them the ropes.
Wow sounds like you are going to have a fantastic track. Are you planning on putting in any areas of interest. We put some salt block holders around at the weekend. Its so much easier having one water trough and picking up horse muck was alot easier and quicker.
Let me know how you get on with it all and any thing you can think of that can make the track fun for them. I'm always open for ideas.