not about motorbikes, but traveling with film and digital in general. been trying to use them in paralel for few times, and just cannot get over with the obsessing about which shot to take on film and which digital. usually end up taking duplicates, neither of which is very good because my focus was elsewhere (in medium, gear) than the subject itself. from now on I've decided not to even try anymore. its either film gear and not even camera phone with me, or all digital. then there wont be a problem 😛
it will be amazing journey Frank has ahead of him. well planned is half done, so careful consideration is good thing. I'd go light, two small bodies and lenses, so no need to switch lenses, and whole package fits nice to tank bag or such. and gear does not stand in a way for the enjoying and documenting the trip.