I have a ranger with a black bottom. I pull it up on shore a lot. I have a hambys keel guard. With a keel guard I wouldn't be to scared of rocks. What I was impressed with was how many scratches pulling up into bullrushes, wood, and cattails puts on the fiberglass. My old lund had somewhat of an aluminum strake that acted like a keel guard. Pulled up gently on rocks and into bullrushes and wood. Definitely be prepared for some minor cosmetic damage.