Heading next week to upstate NY for a week with the family and a boat load of fishing. I'm taking a host of fishing rods and I'm making a rod holder out of 3" PVC pipe to keep them protected for the trip. Does anyone have any ideas on the best way to mount this "rod holder" on the roof rack on my van?? I've been told to just use bungee cords, but it scares me to death the thought of my rods bounding down the rod at 80 mph as I drive along. Give me your best ideas, b/c I've got brain block and little time to fix it!