its not pretty, but it sure will make for a good off road testing circuit. My duster is going to see a lot of dirt roads since most of my buddies have little 4wd mini trucks and I aim to beat them. my car is going to be made to beat on.
You need to find and read whatever tips and hints can be found from Scott Harvey.
Not sure how you will be defining 'beat them' but sometimes just finishing or making it home is a victory.
Doubt I would have made it through if the course hadn't dried out from the wet down by the time the RWD cars ran. With some A/T or rally tires maybe wouldn;t have been such an issue but for my uses well lugged all-seasons are a good compromise. That was the only rallycross I've driven in, and the region has held less than 4 or 5 total in the past 15 years.
Some links to the Harvey articles (at the Shell 4000 Trans-Canada Rally website) in one of my posts here: Where to Start, A Reading List: