Re: truck and 5th wheels part 2
A GVWR trailer of about 6800 pounds would seem to be the most you would want. That is -1000 pound for people and stuff in your truck and -20% for safety and because that tow rating is for a flatbed trailer with 'no' wind resistance. You might be able to go a bit higher in GVWR if you never load it up over 6800 or so, but that is a bit risky unless you 'religiously' visit the scales before each trip.
I had a 24.5 foot Terry Ultralight which might have been a good match. I think most 26 footers and all 28 footers might be a bit much for that truck.
Ignore 'empty weight'. It is not reliable, and even it it is dead on, what good is it to tow an empty trailer?