Fred do you carry your GX680 into the field?
Yes I often take my Fuji on location. I've shot many years from the beaches of Hawaii, Lanzarote, Sardinia, Tuscany, the french quarter in New Orleans.
I've put it on motion picture gibs and cranes. The look of the 125mm 2.8, 180mm 2.8 and 300mm on location is remarkable.
When I do fashion or beauty look books I like to pepper them up with a few landscapes.
Yup I often take the Fuji gx680 into the field, even by myself without an assistant, but keep in mind that though I'm over 50 I'm very fit,
6ft 4inch 230 lbs and size 14 feet and windsurf and kitesurf unhooked ... hence big strong hands.
The GX680 is a very robust camera and the 6x8 format is very nice for landscape. I also shoot two frame horizontal shift with it at times shifting the lens.
With the 50mm a 2 frame lens shift stitch is about a 40mm . Keep in mind that the 50mm is already a 23mm equivalent on a DSLR.
However the 50mm is a heavy lens 1.25 KG.
The Mamiya 7 is also a nice camera with fantastic lenses when stopped down, but it does not have tilt shift.
Also keep in mind that kapture Group makes a stitch back for some digital backs for the Fuji GX680. Two frame stitch with even a modest 22MP back
is quite nice and gives you 40MP final image. Very quick to use and you still get to do your full composition in the viewfinder.
The moving loup viewfinder also lets you get very accurate focus even when tilt shifting.