Txfamilycamper: Welcome to the forums and to fulltime rv'ing. I have a couple of questions. The first is you say your f 350 dually will weigh 14,000 and your toy hauler will weigh 20,,000 for a combined weight of 34,000. I looked at the curb weight of the f 350 on the Ford site and it weighs 7,500. I am a little confused. I don't think you will be putting 6,500 on your hitch when you hook up.
My semi tractor weighs 17,000 alone and my two axle 42 foot fifth wheel weighs about 17,000 also on CAT scales which 34,000 give or take when I am fully fueled with about 200 gallons. That is why I am confused by your weight totals.
Thank you, Dave