A couple of weeks ago I did a three day tour with Norm (my Cross Check) on mostly gravel roads.
Lake Cascade, Idaho by
Bike Hermit, on Flickr
That's Norm in the middle. At the front of this group is a Fargo with a Bob trailer. Both worked well. I like the Fargo because the handlebars can go really high. A 26" Disc Trucker would make a great offroad tourer...the bottom bracket is higher than a 700c bike.