Attended the CFR district meeting tongiht and talked with a couple of guys who raced on this track before and gave me a couple of tips I thought I would pass along:
Before the race clean the car, wax it really good, then spray WD40 or Pam everywhere you can to help keep the clay/dust/dirt from sticking.
After the race hit up the local car wash to spray the car down and remember to get up under the car and the suspension.
They used to buy foam, like those to make couches, cut out a wedge and stuff it up under the wheel well guard to help keep excess dirt out. They also suggested to *not* use the spray foam because well it doesn't come off.
They said with only one to two cars out on course at a time, like a regular autox, one shouldn't see a lot of dirt flying up at them.
With our speeds we shouldn't be ripping up the track that much to cause any difficulties.
One guy did mention that he wasn't sure about the status of the infield portion.
They said its a blast to run out there and to have fun
Pending weather and whats up I may try to make it back Sunday to spectate so that I can run in the future.
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if you can only race me in a straight line then whats the point 
...91 SMF SCCA
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I see people out there spending money on the car to improve it … If you spend half that effort just working on your driving skills, making you and the car work together as a team, then you’ll go faster – period. To make the car go a second faster on the track takes a lot more energy and money than making yourself drive it one second faster.
– the late Tom Thrash SCCA Solo E Production