I've used dual-cam hitches on several trailers in the 25-35 ft, and 5 to 9K weight range. In tens of thousands of miles, I have had nothing but great success with the system. The only drawback is that the system is quite noisy, and can groan, bang, and pop like an old pirate ship, as you twist into tight spots or back into a campsite. I would either buy a dual-cam or the Curt system you linked. By the time a dealer give you the, "we recommend two sway bars with a trailer this big" it's time to move on to something better. IMHO, your rig is WAY too big for a friction bar, or two. BTW, etrailer is an awesome company to do business with. Good luck, and make sure that you DIY this job. Nothing like having a complete understanding of your hitch and sway system, AND know that it was installed properly. On three occasions I have taken dealer installed hitch set-ups off, and totally reinstalled them, so that it was safe and properly set-up. One was done for the very first trailer I ever bought, and the dealer had my Tahoe so screwed up, by the time they installed the hitch and brake controller, it was unbelievable. The others were friends who bought trailers and had paid big bucks for hitch installs, only to have me pull everything back off, and start again.
