Length does play a factor into the equation in regards to a shorter wheelbase tv. You don't want the tail wagging the dog due to an extreme short tv/ long trailer situation.
I will try to find the chart I have come across before in regards to the suggested max tv wheelbase vs tt length. I will look some more for the one I was referring to, but here is another one I found
. While there is no set standard, there is a general rule of what works the best for a safe and stable tow.
Have you searched any GC forums? When it looked like my wife may have gotten a Durango I was over on one of the Durango forums, and I want to say it was suggested to stay under 26' or so..... Can't recall for sure. And she didn't end up with a Durango, so didn't retain it I guess. Lol