BTW Our 06 3400 Montana is exactly 39 feet 3 inches from the very front to the very back... Regardless of what the spec's say 39 feet 3 inches is what we have to park
We long times in ours that is we spend at least six months on the road. We have well over 40K miles on this 06 and it has held up well but not without problems.
These are large and heavy units and with Truck attached even longer and heavier. We are not fans of off the beaten track, smaller rough roads and the Alcan highway is a challenge for any brand.
I would agree that a one year run would be a good idea.