However, I did come across an introductory class offered by BICAS, our local non-profit bike repair and recycling collective.
The class was very informal and had a lot of group participation. This class was the first in a series of four that will be taught, and an organized S24O (Sub-24 hour overnight) will be happening through BICAS on May 18-19. Unfortunately I will have to miss the next two classes and the S24O due to prior commitments. I am truly bummed!
Part of this class went over what bikes were commonly used for touring and camping. Of course Bromptons aren't on this list, but the consensus was that you can pretty much use anything that will carry your gear. Steel is good because it is forgiving (compared to carbon or aluminum) and can be bent back into shape if in a wreck.
If you are using full size bike, you should think about whether to run 26" or 700c wheels depending on tire availability during your travel. Since the Bromptons have 16" wheels, we just have to carry our own or have someone on speed dial to ship them when we need them. Don't expect shops in small town to carry tires and tubes in our size.
The internet resources are really great, particularly crazyguyonabike.com, which is a site where anyone can post up their tour experiences and pictures. Searches can be done using keywords for location or route. You can really spend weeks just browsing that site!