[addicted2sp33d]

I prefer to transport upside down, because my FnD has a keel, so it can't possibly sit flat on the crossbars.

I've also seen noobs' kayaks riding "right-side-up" with loose straps and the hull is generating lift., so I usually transport like this:





Like Jimmyz123 said, a solid bow line and solid stern line will help immensly with stability.