Here's a few ideas,
Bonfire or Bonfire Brats
Fox River
X Tractor
Steel Plow
New Crop
The Truck Ups
Tailgates N Coolers
Legal To Drive
Wabash Levee
Prairie Wind

Remember you can't use another company, band, or artist's name which is trademarked in your band's name. This will become important when you start selling merchandise because you can and will be sued. Also you don't want to be confused with other bands so pick something unique to you. Whatever name you come up with be sure that it's not already taken and trademarked.

BTW, just FYI, Free Beer was a band on a major label that didn't make it big - they were actually pretty good. I met them in Nashville years ago. The name didn't work very well as the audience tended to actually expect free beer.... smile