How heavy is the loaded TW of your camper?
Does the actual hitch head or draw bar your friend is going to use have a weight carrying rating to hold the dead weight of your loaded camper? You did not say what hitch was being used, if it is your WD hitch put in his truck, many of the WD hitches have reduced load ratings if the hitch head is used in weight carrying mode.
What is the receiver rating of your friends 1 ton truck? You did not mention the brand and year. Some of the older 1 ton dually's only had a receiver rated for 500 to 600# in weight carrying mode and needed a WD hitch to be able to go higher in weight.
As to the truck and your statement
ulvik wrote:
our TT does not even squat his truck
Did you use a tape measure to check the distance the back of the truck sagged when hitched? Even a 1 ton truck will sag something with a 500# plus loaded TW. How much depends on a few things. Empty bed,fully loaded bed and the actual raw trailer TW etc.
My 1 ton truck rides a whole lot better on 500# and above TW trailers when used with a WD hitch. My upgraded hitch setup does not require the WD hitch but I myself would use the WD just for the better ride. If you are letting your friend borrow your WD hitch to go with his truck to allow him to have some anti sway control, I myself would tell him to hook up the WD bars and have a great trip.
Hope this helps
John