Hi! In my neck of the woods the trails are narrow and twisty, crossways auger mounts are not too practical. Lots of guys around here take their auger apart for transport, I don't think too much of that. My first setup was a lot like akdg's box, but with the auger lengthwise on top. I found that to be very top heavy, and not practical for any distance. My current system uses 5/8" aluminum rod and T-slots extrusions to create a modular system that is both practical and flexible. My gear rides so well that you don't even know it's there! I carry a Quickfish pop-up, one or two chairs, a power auger, Mr Heater Buddy, Vexilar flasher, Rotopax gas can, 6 to 12 rods, tip-ups, etc. and bait, snacks, survival gear, sno-bunjie, etc, etc. Super happy with the set-up, can't think of anything I would change at this point.
