Those things are the perfect shape for guns, fishing rods, and skis, right? I would never put fiberglass fishing rods, or laminated composite skis in an unpressurized, unheated compartment on an aircraft. After about a half dozen trips, you will find yourself buying new equipment to replace the skis and rods that are now falling apart. I saw a guy who did, but it was his personal airplane anyway so I'm sure that he wasn't bothered by the cost, just the inconvienience.