We're towing it with a 2003 Dodge Ram 3500 DRW 4x4 Quad Cab Long Bed 5.9L Turbo Diesel (not HO) w/ the SLT 47RE transmission. It was tough getting an exact number for the tow rating, but all numbers fell between 11,500 and 13,000. We referencedhttp://www.trailerlife.com/wp-content/uploads/2012/01/Trailer-Life-Towing-Guide-2003.pdf andhttp://dodgeram.info/2003/load-tow/2500.html. I just realized that you almost have the same truck, so those links should help you!
We weighed in with a modest amount of gear in the rig at about 20,500 pounds (includes myself, wife, 3 month old boy, and a 50 lb labrador). This puts us over both the 19,000 and 20,000 GCWR that the vehicle may actually have (couldn't figure that out definitively). I'll post the exact breakdown of that weight once I find the paper it's written on. From memory, we were around 8,000 for the truck (including us) and 12,500 for the trailer. I remember the pin weight calculated to right about 13% of GCWR (sweet spot is 10-15%), so that puts it at about 2665.
I'm using the B&W Patriot 16k hitch. It was a reasonable price and couples nicely. I didn't notice any slack on a 12 hour drive with many stops. If this were a newer truck, I would have bought the B&W Companion instead.
My understanding about our truck is that the weak link for towing is the transmission, so it's not necessarily a safety issue to be over the GCWR, but rather a longevity issue. It's at about 160k miles, and is on its second transmission already. We are going to install a temp gauge on the transmission and make some other mods to make it tow better. We plan to replace the transmission as needed, as it's much cheaper than a new vehicle. I also baby it quite a bit while towing.
It was pretty easy to tow, not having any prior experience towing anything even close to this length/height. Wind didn't bother us much, and that's even with driving across Southern Minnesota where all the wind farms are.
I think Crossroads means to say that the pending travel trailer models will be 1/2-ton towable. The fifth wheels definitely need a newer 3/4 ton. I think the limiting factor when towing a fifth wheel is the payload rating, and not the GCWR. Regardless of the advertising, I think these are way lighter than competitor models, which have unloaded weights that are higher than my loaded weight.
I don't know the width, but I think it's 96".
We do have the Happijack bed option. It is one queen bed on top, and two couches below that fold down into another queen bed. We are very impressed with the quality of it; much more than I expected. It's going to be in the unit you buy unless you order one new. The only true "option" on the ones they just shipped out to dealers is going to be the 2nd A/C. Ours doesn't have it, and we didn't want to pay for it. We are up north, not in Atlanta.
I think the ones going to Canada may add the dual pane windows. Otherwise, everybody seemed to order the same options.