While I'm just a poser here as I've yet to take delivery of our new TT, I too expect to be rolling down dirt roads where and as I find them. Have you given any thought to improving the ride of the TT by adding after market suspension products? I've only lightly looked into this and see there is an amazing array of products on the market;
Equa-Flex Cushioned EqualizersDexter E-Z Flex Suspension KitRoadmaster Active SuspensionMOR/Rydeetc. etc. etc.
Trailer Life has a
page of information on the subject, if you know how to read technical jargon :h