If your truck had a factory hitch in the back, then it likely has the plug for the brake controller. But if you don't want to mess with it, I think most places charge around $75 to install it.
Regarding your camper, if it's a full size travel trailer (not a pop up) then you really should take a hard look at your truck and camper specs before trying to get that truck set up to pull that camper. A few questions:
What is the total length, total dry weight, and total cargo capacity of your trailer?
What rear end does your truck have?
How far and how often will you be pulling the trailer?
Life can only be understood backwards; but it must be lived forwards.
- Soren Kierkegaard