I have read the threads and checked out different websites and the Revo's are generally rated a top performance tire. I am looking to get a set of new tires for my future Chevy 2500HD next year. I have noticed that there has been some negative comments concerning the tire's preference for picking up gravel and rocks. I am asking because we have a long gravel driveway with a crush-2inch rock base. The last thing I want to do is to pick up and then kick out rocks on a frequent basis. How bad is this Bridgestone tread problem?