Is anyone towing their boat with this vehicle? My wife's GX doesn't have a hitch, and I am looking at recommendations for one. It looks like there are two options, one that mounts underneath to the bumper (Class III 5000lbs), that is fairly inexpensive and easy to install, or one that mounts to the frame (Class IV), which is considerably more expensive and labor intensive. I would prefer one that mounts to the frame, but for the amount of towing I would be doing with it, I'm not sure its necessary. My boat is a Ranger RT188 aluminum boat and that is probably in the 3000 lbs range fully loaded. Any suggestions?