First congrats on the new Challenger. The new YT model looks super. We've towed our Explorer 4 down for more than 28,000 miles. It has been great. I'd recommend you read all of the above and then take an electronic stroll over to
Trailer Hitches & Vehicle Accessories (800)298-8924. Lots of information, lots of videos and lots of pricing. You probably find need items a bit less expensive elsewhere but their information (IMO) is the best.
Again, welcome to the Challenger family.