I've used a Sinar view camera in more precarious places than that Greg. But what Sella did with his huge plate camera makes us all look like wimps. In one of my books there's a picture of him hauling it straight up an icefall at 22,000 ft on Chogolisa.
If the wide angle perspective was appropriate for the anticipated scenery, I carried the GW690 ii with me on long-haul trips after I was 68 or so. But if I needed to home in on distant spires or foreground details, my idea of an older age lightweight system became 6X9 roll films backs for my little Ebony 4X5 folder. A compact 300 Nikkor M lens for 6x9 became the perspective equivalent of 450mm with 4x5 (i had 200 and 105 mm M's too; but generally preferred a trio
of 125 NW Fuji, 180 Fuji A, and 300 Nikkor M). The biggest problem with a view camera in the Wind River Range was more horsefly bites than quickie RF shooting (should be called Moose flies or Bighorn sheep flies there - you can't get above them).
For airline carry-on purposes, I have opted to carry both a Fuji 6X9 RF plus a P67 with a tele; or else, the RF plus a the Ebony 4x5. That gave me quite a bit of versatility. For car camping trips, the RF's plus an 8x10 system is realistic.
