Seems like rv folks like to lump a 1/2 ton truck in one load and pulling capability.
Take the F150HD. Ford markets the F150 with three different frame sizes with 6xxx lb on up to 8200 GVWR and 3200 lbs up to 4800 rawr....and of course a whole fleet of different size engines that a couple can out muscle some engines used in some F250 trucks.
No doubt a F150HD 8200-7850 GVWR and 4800 rawr with the 3.5 EB engine can safely tow some 30' 5ers.
And lets not forget GMs '00-'06 1500HD which lots are still in use around farms/ranches/construction work places. These trucks come with a 8600 gvwr/6000 rawr 6.0 engines with 11k-12k lb tow ratings and 3000-3200 lb actual real world in the bed payloads.
Lots of replies from those that bought the wrong size 1/2 ton truck then post a 1/2 ton truck can't safely tow a 5th wheel trailer.
350 lb pin weight on a 30' 5er ?? IMO some one is mistaking one or both numbers.
Now having said its possible to load a 30' 5er with enough of Lucy's rock collection and place it just behind the trailers axles and get any hitch weight needed but its gonna' be a handful running down the road in a straight line.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
'03 2500 QC Dodge/Cummins HO 3.73 6 speed manual Jacobs Westach
'97 Park Avanue 28' 5er 11200 two slides