So, since there's no way to tell where this is all headed, with the time crunch, and a season that gets a lot busier as it warms up, I've had a few thoughts:
ADVers get automatic upgrade (natch) on backer rewards. Currently I'm thinking that the $25 level, you'd get an opener, instead of just a virtual handshake (they retail for $20 anyway...)
At the $50 level, instead of a regular-old bottle opener or something simple, I'd work with you on the design...which is the hundred-dollar level.
At $100, you'd get a few to share with your friends...instead of 1.
And just so that this isn't straight retailing, and going into the Vendor section (not a bad idea at that), the build log will begin as soon as I can take and upload pictures...part of the budget for the trip is a better computer and camera setup to document the journey and the artwork created along the way.