Travel trailers are designed for stability purposes so that the tongue bears about 13 percent of the total trailer weight. A travel trailer weighing 9000 lbs and properly distributed for towing will have a loaded tongue weight of 1170 lbs (based on 13 percent). If you only had 1100 lbs payload remaining the last time you weighed your truck, then you have exceeded your payload. Don't forget that the hitch weighs about 100 lbs.
1/2 ton trucks all have high advertised tow ratings (what they can pull). The problem is that they run out of payload ability long before the tow rating is exceeded. Notice on truck commercials they are usually towing boats or equipment trailers. These type of trailers have less tongue weights than rvs. Rvs need the high tounge weight to reduce sway due to the large sail area of the sides (crosswinds).
