You've got a hitch and now you're ready for your trip, all your toys in tow. No, wait. You also need wiring harnesses, ball mounts, trailer balls, etc. All the accessories you need to get, and keep, you on the road for towing can be found here. Draw-Tite makes excellent hitches, and hitch accessories.
Sway control systems can be used to reduce trailer sway and improve handling in adverse towing conditions. Sway control units dampen trailer sway caused by crosswinds and traffic.