Gonna Get Messy is in, but I have not been there before. Turn ins are Sunday, but there is lots of live music at the Irish Pub on Friday night.
I talked to the organizer when I ran into at KC Backyard BBQ Bash in Parkville the other day. He says most of the electricity won't be hooked up until Saturday, but some spots will be available Friday night. He said to make the request electricity on Friday if you're coming in then.
The Pirtle Apple Wine Challenge turns are Saturday at 6:00 p.m. It's an open contest, but you're paid with your entry fee.