Well, the only things I can really suggest is make sure your car is ready. Check the brakes, tires, brake fluid and all the mechanicals. Hard to get stuff like pads and tires short notice, so order them now if you need them.
Other than that just get on youtube and search for MSR Cresson 3.1 and 1.7. Watch some video of it before hand. Without driving it, it's tough to tell anything, but once you get out there it will click.
If you want to get together for dinner sometime, I'm sure a few of us can meet you and go over everything to expect and answer your questions. It's a good track and the TDE folks are top notch.