A lot of this depends on what is most important to you, the trip, or the photos. On a bike, every gear choice is about compromise.
I know you're committed to Fuji, however if I were going on that trip I would leave my beloved Fuji gear behind and get an OM-D EM-5 and 2 or 3 zuiko pro zooms. I would probably also take something like a Sony rx100 or Panasonic lx100 for backup/pocket, or another Oly body.
I love my Fuji gear but two years on a bike the size /weight advantage of Oly is going to make a real difference. The zuiko pro lenses are tiny jewels of awesome, and the whole rig is weather sealed and In-body stabilized and will cover just about every situation.
You're investing years of your life on this. The heavier/larger the gear you take, the more your gear will become part of the memory, and almost certainly not in a good way. That is not what I would want from a once in a lifetime trip like that personally.
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