We put a hitch on our first FW, in 1993, and towed boats weighing from about 1,900 pounds with its trailer up to 5,000 pounds with it trailer. It was a Jayco 215SD, only 21.5' long, more or less and very stout. When we bought our new 2012 Jayco SuperLite HT 26.5 RLS, we asked the dealer to install a hitch and they said wouldn't do it and it would nullify the warranty if I had it done. Found a professional welder in another town who did install the hitch after reinforcing the frame about six feet toward the axle. The whole process took about four hours and included them wiring a 7-pin plug as well. We have since towed our Crestliner SuperHawk 1900, behind the FW, about nine times to our favorite place, Jackson Lake in Grand Teton National Park with no problems. We are about 70' as well, but in Wyoming we can go to 85' I believe, as long as each "vehicle" being towed has brakes, which ours do. I can send you some pictures if you would like, just send me a private message with your email address and I'll get them to you. By the way, due to the way the hitch was attached and the professional care that went into it, I have had no frame problems either during the 2-year warranty period of afterwards.
