wavy

In a couple of weeks I'll be carrying a directional digging pipe
section a few hundred miles with an S-10 Blazer. The vehicle has a
good, sturdy set of Yakima bars, and I first moved the pipe that way.
But this thing wieghs almost 100 lbs and I'm going to be carrying other
stuff up there anyway and I really would like to carry it underneath
the vehicle, just as a possible safety issue and stability issue.
Its only about 3" in diameter and about 10 feet long.
Just wondered if there's similar accounts or recomendations, thanks.
-WaV