I have towed large 14,000 lbs plus fifth wheels, using the fifthwheel hitch and gooseneck adapters ************************* I also work on campers and tow them part time, In my opinion I have found that they handle better with a goose neck adapter and, "I was surprised by this" My experiance is that they don't buck as much with the adapter. With the adapter you have a lower center of gravity in the truck bed, not at the top of the bed like a fiver. And as for lateral torsional stress, there is a lot less stress on the truck and trailer frames with a gooseneck, because it can pivot more from side to side, as two seperate units. When using a fifth wheel, the side to side stress is acually more because if the trailer or truck are on uneven ground, one will pull on the other for example if your truck is on high ground on the left side and your trailer is on high ground on the right side, it trys to flex the others frame, and that is hard on both frames. And it happens because most fifth wheel hitches have very little side to side play. I have found that it is easier to hook up the gooseneck than it is to hook up the fifth wheel. I know that sounds backwards,because when you back up and the kingpin is just supposed to latch into the fifthwheel, but the goose adapter that I have, also latches automatically when you lower it onto the ball, and I can reach the safety pin from the back of the bed, I couldn't do that on the fiver. It also leaves my bed empty to haul extra stuff, because that fifth wheel hitch isn't there taking up half of the bed. When I used to hook up to the fifth wheel, it was harder to pin the safety latch, because you had to try and reach the pin from the side over the bed and under the side of the camper, and the clearance between the two and position of the latch mechanism made it a pain to reach. I also like the idea that I don't have to wrestle that big fifth wheel in and out of the bed when I need to haul our other goosneck trailers. I use a bugie cord with a piece of tape in the middle of it, streched across the top my truck bed postioned over the ball. I just back up untill it is centered on the trailers gooseneck, and the rest is history, no guessing. It is also nice because I don't have those reese rails in my bed anymore, they were always a problem if you haul anything loose, like dirt or gravel they were a pain to clean out. Hope this helped, I didn't mean to ramble but I'll never go back to a fifth wheel hitch in my truck, I have been using the adapter now for over two years. I have found I can go off road better with the adapter. We rodeo and sometimes the places that we have to get to in order to park the camper are really in uneven(pastures) even crossing small ditches. I know that the camper manufacturers won't endorse any hitch other than what the trailer comes with, due to possible liability and possible warranty issues,but I have hauled new campers from thier factories, and the guy's that build them have commented when I asked about the adapter, and they stated that in thier opinion, "off the record" a goose is far better on the trailer than the loads of a fifth wheel hitch are. Just my two cents worth. Good luck in your towing.