They can come and go as they please, it's only $3 and they have to sign the waver. I really don't enforce the spectator pricing. but I'm going to begin since we had a ton last event and only one paid. if you guys want to run registration. (collect money as people enter the gate and hand them a number card) that will be a huge help since that's usually one thing that holds me up int he morning from getting started is waiting for everyone. to register.