In my experience, i just finished a hike with my R6 and basically i was sooo happy with how it performed... 1. i recommend the Canon RF 35mm f/1.8 IS STM Macro lens cuz its tiny and really light.

• i have no complaints using the Peak Design Capture Camera Clip V3 to keep it on my backpack. i learned that keeping it simple is highkey the best move!!

For ur situation, I would suggest focusing on the power delivery and high-speed storage side of things since mirrorless is way hungrier than your old DSLR. Saw this earlier but just now responding... basically, i've been shooting the R system since launch and the biggest game changer for travel is definitely USB-C charging. Make sure to get a power bank like the Anker 737 Power Bank PowerCore 24K because it supports the Power Delivery spec needed to actually charge the Canon LP-E6NH Lithium-Ion Battery inside the camera while ur hiking. Technical-wise, you really gotta watch ur SD card speeds. The R6 is a beast at 20fps, so i'd recommend at least a SanDisk 128GB Extreme PRO SDXC UHS-II V60 card. If u use slower cards, the buffer will lock u out just when the light gets good. For lenses, if u want to stay light, the Canon RF 24-105mm f/4-7.1 IS STM is surprisingly sharp for the weight, tho I personally prefer the Canon RF 14-35mm f/4 L IS USM for hiking because it's so wide. Also, maybe grab a Hoya 77mm NXT Plus Circular Polarizer Filter to cut through haze in the mountains. TL;DR: Grab a PD-spec power bank for in-camera charging, fast UHS-II V60 cards to keep up with the R6 speed, and a solid circular polarizer for those trail shots. gl! peace

Any updates on this?

TL;DR: Need to know the climate first since reliability varies, but keeping it simple is usually the win. Quick question tho—what kind of weather and terrain are we talking about for these hikes? Is it gonna be super humid or more of a dusty, high-altitude situation? I ask because it totally reminds me of a trip I took out to the Pacific Northwest a while back. I was so satisfied with how my kit was performing, but I ran into this other photographer who had every single accessory you could possibly buy. He spent the entire sunset fiddling with some complex rail system and specialized cleaning kit he thought he needed. By the time he actually looked through the viewfinder, the light had completely dipped behind the mountains. We ended up having to help him organize his gear in the dark because he had so many small parts scattered on a log... it was a whole ordeal honestly. Just made me appreciate a reliable setup that doesnt get in the way. Anyway, give me some more deets on the location!