I am looking for a bike rack to fit on my 2002 Honda CRV. It has a factory roof rack. I am looking at the Yakima Mighty Mounts with the Anklebiter or Lockjaw. I am also looking at the Spare ROC. I have two road bikes, one has a carbon frame and the other is aluminum. I live on a dirt road and worry about the dust getting on my chain if I get the Spare ROC. I also worry about any scratching of my paint or the bikes rubbing together while transporting more than one bike with the Spare ROC. Does anyone have any experience with any of these products?