There have been cyclocross races at Wyco a few times in the past several years. The only thing that could be considered damage from those events was the matted down grass from all the riders doing multiple laps of the riding course they defined. Nothing that didn't just repair itself.
I went out to WyCo the first time they set this up and had a great time hanging out and watching. They had vendors and beer and it was fun to watch. Hopefully this won't do any major damage and we can all coexist successfully. The main damage the first time they did it at WyCo was a small mud patch near #15 fairway, but like Tracy said, it repaired itself fairly quickly. If you like riding, even casually, I encourage you to go check it out.