Howdy -
I've toured for more than 15 years on a modified Trek 8000 with panniers - not a trailer. Anyway, I've done lots of dirt roads in the process, including some pretty extreme ones like the Morrison Grade up to the Beartooth Highway, Skutumpah Road and some spur trails in Grand Escalante, and lots of remote forest roads in British Columbia. You go slower, but the trade-offs in scenery and quiet are more than worth it. Here's a pic of a BC forest road. Best - John