Just read this as I was about to start packing for a road trip. Here is my set up:
Rhino racks, 3 boards, 5 sails (4.5 - 7.8) 3 masts, 2 booms, 1 paddle. I've got a bit of packaging between the boards to stop crushing, sails are loose in bag gun sails combo bar -- best bit of non-sailing kit Ive every bought) and don't get crushed. This is obviously for highway, intercity driving only (with people in the car), not just "going to the beach", as it is, in the words of my co-pilot, a "bit of a palaver" to get on the roof. (sails, booms, masts and even boards just go in the car for local trips)