Enjoy! You'll LOVE the elevation change that you can't get a good sense for on the video game. The weather looks ify today and tomorrow looks like rain here, so you'll definitely get some wet track practice.
If you get on Patriot course, really mentally soak up the elevation coupled with camber changes as those are the key to doing it well. You'll find that you really need to manage the throttle well heading into the corkscrew uphill else the front will push away (or in the M-school case, DSC will be going off heavily).
I think you do South course also which is a blast. You get to do the corkscrew the other way, and there are some interesting lines you can take down through there.
The BMW guys are great though. They make events like this so much fun.
2011.5 M3 sedan 6MT, Silverstone, no sunroof, no EDC, but all other options
2001 M5 LeMans Blue/Silverstone
2006 330i 6MT Red/black, ZSP, Nav, etc.
2001 Audi S4 6MT; 1996 Volvo 850R wagon