...with the Pentax 645Z, FA 45/2.8 and FA 150-300/5.6 ED. Tripod and filters (ND, GND, Pol).
The camera performed really well overall, and it was a pleasure to use in the field.
The FA 45 prime did not disappoint, even though I found that it is really much better suited to "reportage" than "landscape" (i.e., it excels in the central part of the frame, between f/4 and f/5.6 at medium distances, but it never gets 100% critically sharp in the corners even stopped down to f/11 or f/16). I think for this kind of trip, next time I'll bring the 45-85mm zoom instead.
The FA 150-300 zoom produced some superb results, but it is prone to vibration, and it really wants to be used on a tripod all the time, and with mirror lock-up.
All in all, I'm pretty satisfied about how the photos turned out.
A few samples below: