The problem with setting up the hitch at the dealer is that it done with basically an unloaded trailer. You will need to load the truck and trailer for a normal camping trip and set the hitch according to the manufacturers directions for a loaded truck and trailer.
You will need to make sure that you have the hitch instructions and watch the shop do it one time. Or get the dealer to agree that they will reset it once you get the trailer loaded.
Problem with the dealer setting up the hitch correctly, is that they usually don't do it right in the first place. I have found that learning to set up a hitch yourself is the best way.
