I added one to a 2001 T&C that I used to own. It was nice for the piece of mind. It was a pretty painless job to do yourself if you have some mechanical aptitude. I think you would be fine with whatever etrailer suggests as they are very reputable. I think I actually have a cooler still in the box that I bought for our second T&C, but then didn't need it because it came with one already installed.
After having the vans and then changing to a Ford Expedition, I sure do enjoy toying with the Expedition more. I hardly even think about the trailer back there and the van always had to be in 3 because it couldn't be in the highest gear. I still remember screaming along the interstate at 3500 RPM because we had to be home for something so we were really pushing it!
"The babbling that I brook." - Pink Floyd
1991 Scamp 16'