Finally did it. Pachena Bay to Gordon River, 75km, seven days, the A7CR and the 20-70 f/4 and nothing else apart from a spare battery and too many granola bars.
Day one was the classic: fog until noon, then the sun burning through over the sea stacks past Michigan Creek. The 20mm end was the right call maybe a dozen times all week and that was one of them. The rest of the trip I lived between 35 and 50.
The ladders. Nobody describes the ladders properly. Some of them are taller than my house, and you are not taking photos halfway up one with a 20kg pack, so the camera rode in a chest pouch and I mostly shot from the top looking back down. Got one of my buddy Dev climbing out of a ravine in a green rain shell that I really like. He's tiny in the frame and the ladder just keeps going.
Tsusiat Falls in the evening, beach camp, everybody's socks drying on the driftwood. My favourite frame of the trip is exactly that, a row of socks with the falls behind them. Not sure anyone else will care.
The weather turned on day five. Two days of proper rain. The camera got wet, it was fine. Shot almost nothing in that stretch except the boardwalk planks shining and a raven that followed us for an hour.
Months of planning, seven days on trail, about 1,400 frames, maybe 40 I'm happy with. If you're thinking of doing it with a big zoom kit, don't.
Happy to answer questions if anyone's planning it for next summer.