UPS has a station at AirVenture during the fly-in. You can ship from Clinton, but it will won't go out until Monday, and arrive OSH on Tuesday if you ship overnight.

There is another way though. I'm driving to both events, and I have room.

Mark Buchner
East Coast Outkast Fearless Leader
and Cessna 150-152 Fly-In Foundation Director of Operations

[Linked Image from visitedstatesmap.com]