Meet and greet, how long are you there?

I was one of the lucky few to get selected for a meet and great for tonights show in Cincy, however my wife is the only one attending the show with me and she’s pregnant so I don’t want to leave her for too long. For those that have attended a meet and greet, how long are you back there for? We have some friends sitting in the lawn area that she could go hang out with assuming I wouldn’t be gone for too long. Any input would be great!