The hitch is really easy to install. The screws for the hitch are already in the frame - yep, they come with the vehicle. You unscrew them, put the hitch in place, and screw them back in. You will need another person (or a jack) to hold the hitch in place while you tighten the bolts.
The hitch I bought was $130 shipped to my door (much less than the dealer option) and purchased over the Internet. It's a Class II hitch which means it is designed for 350 pounds of tongue weight and will pull 3500 pounds. This isn't a problem since the HiHy isn't designed to pull more than that. Many of the hitches sold for this vehicle are Class III - maybe so you can have a higher tongue weight. Finally, I'm fairly happy with it. My only concern is it partially (about 1/4" to 1/2") blocks the spare tire. I played with it a bit (but didn't completely lower the tire) to see if it would hang up. It didn't appear that it would.
I'm told you can get the part #18248 at any Draw-Tite dealer, although you may have to order it. You can go to their website and find a dealer location by entering your zipcode:
www.draw-tite.com.