I have a Sprinter, 118"wb passenger van. Recently finished our first trip pulling a 19' Bambi, with no problems or issues. Illinois to Arkansas and back, through the Ozarks. No equalizer or sway control, and never needed, it seemed. Lots of twisties, taken exhuberantly - scrubbed the corners of the front tires pretty well, and the trailer tracked well. Installed a Tekonsha Prodigy brake controller, and kept backing down the setting as the trailer was so light it didn't need much brake. I usually average 23-24mpg, and with the trailer i saw 16-18. You'd feel the weight on hills, but the little diesel always had sufficient, but certainly not overwhelming, power. The tongue weight just leveled the van out, and made it ride nicely. We did not carry water, but always filled the tank at our destination if there was no hook up, and emptied it through use and dumped the rest. We always dumped the waste tanks, too, before leaving any campground so as not to carry any extra weight around. The longer 140" wb could only be even more stable. The Sprinter/Bambi combo seems to be a good one.