Those are some good questions and I have no answer for them ATM. I found this though:
"You'll begin with classroom instruction to familiarize you with the track as well as safety information and High Performance Driving Techniques. Then it's drive time!
If this is your first time at our school, one of our instructors will take you on the track to show you how to safely get the most out of your car. The rest is up to you. Sharpen your own driving skills. Instructors are always available to help you, if needed, throughout the day.
Accelerating, cornering and braking. Put your car through it's performance paces. Track sessions run throughout the day, so you'll have plenty of drive time (fig. 3). Enjoy the excitement of on-track performance driving!"
I think access to instructors isn't included for the MAP event, so that's what your getting for the extra money. Looks like they run 25 min sessions and I imagine they limit the number of cars in any one session.