I'll be there for my 3rd Ofest. Probably about 20+ people from Houston will be driving up.
If you go to the website there are multiple package options including day packages. To view the concourse on Tuesday is free as well as to watch the track activities throughout the week.
It's a great time. There were a bunch of E9X M3 at Wisconsin last year, so I assume there will be a bunch in attendane this year also.
Current: '13 E92 M3 Euro Delivery
Wife's: E36 M3
Gone: E86 M Coupe; E30 M3, E39 M5