The listed tongue weight is the figure posted for an unloaded trailer coming off of the factory floor. The listed tongue weight on my Surveyor was 559 lbs., but after adding a battery and propane tanks, it came across the scales at 640 lbs. on the 1st trip back from the dealer. Camping ready, I am around 700 lbs. with the camper weighing in at 5500 lbs....about 13% on the tongue. I try to load the back of the camper heavy so that I can continue to use 800 lb. trunnion bars and keep the tongue weight from creeping much over the 13%. But if the camper tends to have a light tongue weight, then more weight needs to be put up front.....it should be a careful balancing act for every camper.......and to know your actual weights.
Chap , DW Joy, and Fur Baby Sango
2006 Ford F150 Super Cab 4x4
2008 Surveyor 263