The LCC (load carrying capacity) on your truck is 1212lbs, that is how much total weight can be added to the truck. That weight assumes you have a full tank of fuel, and a driver. You have to take that 1212lbs, and subtract the weight of you wife and kids, and anything you put in the truck(bikes, dog, firewood, chairs, etc), then you have to subtract the weight of the hitch (about 100lb). Then you still have to subtract the tongue weight of the camper.
The tongue weight on these trailers once you get them loaded is going to be 900-1000lbs. With a 1212lb LCC, that only leaves about 200-300lbs of capacity, when the wife and kids get in, you will probably be overloaded before you add any bikes, toys etc to the bed of the truck.
Unfortunately I think you need to look for a little smaller trailer.