Replying to Roof Rack

I need a way to transport my skis. I drive long distances to the mountain, because I (unfortunately) live a few hours from any ski hills. I want to get some kind of roof rack and I don't know what to get. My options are a box or the clamp style. I would only need to hold a pair or two of skis. The rack would only be used to cary skis, as my truck can carry everything and I just don't feel like having two sharp skis go flying in the cab should an accident or hard braking occur. I have heard that the clamps expose the skis to road debris, but I have seen so many people with skis outside the car, how bad can it be?