Normally when I got to O-fest or Mayhem I pay on-site when I arrive. On Sunday morning, due to the rain and generally miserable conditions, the registration table wasn't set up. I meant to check back later, but I forgot while I was getting ready for my flight. So today I filled out the pre-registration form available here:
http://www.ncrocketry.org/uploads/OF_Registration.pdf
and mailed in my check. If there are other people who came late because of the weather, and had the same situation, this is a reminder that it's not too late to pay your flying fee.
Thanks Adrian. Post registration wasn't necessary but is appreciated. The weather really hurt turn out but that just means the next launch will be all the more busy. NCR remains healthy and mostly ready.