tow hitch towing

Quick question - Any thoughts or experience on adding a tow hitch to a 2003 1.8T New Beetle? The goal is not to tow much weight at all - A slim trailer for a couple of whitewater kayaks (say, 80 lbs) and gear (say, 20 lbs - okay, 40 lbs wet). I also want it to disappear when not in use, I...