We were there. My husband and I got in during the lunch break and watched for about an hour. we enjoyed watching the event and talking with observers and competitors. We were not tempted to run my new Z - it would have been embarrassing I'm sure.
Then we went to Bullfeathers for lunch and had another good experience. Clemson is about 75 miles from us and we deliberately drove on the back roads. All and all, a very nice day for us.