Building on the earlier suggestion, I recommend skipping the wide-angle lens. In my experience, it adds way too much edge distortion for clean mountain landscapes. Technical reliability is way more important when you are hiking miles from a store.

• SanDisk Extreme Pro 128GB microSDXC V30
• Spigen Tempered Glass Screen Protector for DJI RC 2
• HeiyRC DJI Air 3 Propeller Holder Silicone Hand launching is actually safer than a pad on jagged rocks, tbh. Just dont rush the pre-flight checks.

Jumping in here... building on the earlier suggestion, i have been flying these mountains for a decade and seen way too many people lose drones to simple mistakes. For the Rockies, you gotta think about the wind and the uneven ground. Hand launching is great until a mountain gust catches the Air 3 right as you're grabbing it. I nearly lost a finger doing that near Lake Louise because the sensors went haywire in the wind. If you want to be safe and stay portable, i would compare these two options for landing:

• PGYTECH Drone Landing Pad Pro 50cm: This folds down tiny for a backpack. It gives you a clean target for the sensors and prevents dust or snow from getting into the motors. In my experience, the cheap circular foam ones just blow away in mountain gusts.
• Startrc DJI Air 3 Landing Gear Extensions: These stay on the drone. Good if you dont want to carry a pad, but they can catch the wind like tiny sails and make the drone less stable during flight. I prefer the pad. Regarding the filters, i have used the K&F Concept DJI Air 3 ND Filter Set 6-Pack and they are super light. Never had a gimbal error once. Freewell is usually fine too tho, just gotta make sure they are clicked on 100% before you power up or the calibration will fail. Tbh skip the wide angle lens. It makes the majestic peaks look like little hills and the edge blurring is brutal for high-res shots. Get a RCGEEK DJI RC 2 Lanyard Neck Strap instead. When you are hiking, you need your hands free to grab rocks or poles without dropping your expensive controller... trust me on that one.

I remember my first trek in the Rockies; hauling a hard case was a huge mistake. Now I just use a Smatree DJI Air 3 Semi-Hard Carrying Case inside my bag.

• Stick with Freewell DJI Air 3 All Day 6-Pack ND Filters for bright peaks. Never had gimbal issues.
• Hand launch; landing pads are basically kites in mountain wind.
• Skip the wide angle; it makes massive mountains look tiny.

Watch your fingers if you're hand launching in mountain gusts. It gets sketchy fast. Also, definitely skip that wide lens... it makes the peaks look tiny and weirdly distorted, honestly.