I owned an early nonsuspended Montague for several years; it was fine offroad. It was one of the first widely available 26" folders and MANY folks tried to buy it from me. Components were rather low-end. Traded it in Mozambique, I think, for a nice carved wooden chest. There's a very happy African styling around Maputo nowadays. For me it was too cumbersome for travel.

I was always an old-school offroader, before suspension (front or rear) and find it unnecessary and interfering with my feel of the land.

Member FoldsInHalf has done A LOT of offroading on his Dahon Jetstream XP. See his websight here: http://www.debcar.com/

Just how gnarly will you get? Take-the-ski-lift-to-the-top-of-the-mountain gnarly? Or single-track gnarly? Or dirt-road gnarly? You know degree-of-gnarly is directly proportional to the amount of broken/bent stuff in the middle of nowhere...

How will you carry your load? I noticed many long distance off-road tourists in Colorado prefer a trailer.