Mark,
We had this dispute a LOT back in the day with MTM2. It's kind of par for the course. Unless you don't allow members of the event to actually race its really unavoidable. My suggestion would be to sit back and wait. Sometimes back in the day tracks wouldn't get released until 20 minutes BEFORE show time with no previews. This makes things a little more fun when nobody has any idea how they're going to do out on the track. And I'd be willing to bet the guys building the course aren't taking the time to practice hourly to get an advantage on anyone else. It didn't happen in the MTM2 years and I highly doubt it's happening now.