The third post of the Good Sam forum thread, below, addresses this issue in terms of Winnebago's perspective. I suggest you read it in it's entirety and make your own decision as to whether or not the risk is prohibitive in your situation. The poster describes a phone call with Winnebago during which Winnebagos 4" maximum drop hitch position is discussed. Here's an excerpt:
"I spent several hours on the phone with a factory rep discussing this very situation. The company position was formulated after several incidences where longer drop hitches were used pulling either a vehicle or a trailer without auxiliary braking systems. In a panic stop situation the added leverage of the longer drop in combination with the lack of auxiliary braking systems caused the hitch to either fold under the frame or be torn from its mounts."
Here's the link to the Good Sam thread with more complete information:
https://community.goodsam.com/t5/mot...h/td-p/2040019