Took me 40 years to get my gear where you are now. Best thing that's happened for my deteriorated knees has been
1. Trekking poles, especially on rugged, stepped downhills
2. Getting proper fitting shoes and boots and using insoles that actually support the foot.
3. Making effort to keep moving and put in road miles when not on the trail.
4. Diet- both for general health and weight loss
5. Occasional use of pain relievers. I carry them, use them only when it's bad and I'm far from a trailhead, but they've been a great thing when really needed.
You've picked some good gear. I've looked at all your base items at shelters and campsites (No REI near me) and they seem very functional and well designed. You've done your homework. I'm sure you'll do more refining, especially with food. Your trail weight shouldn't be over 20, even with food/water.
Enough for me, time to hit the road- I'm hitting the trail for 3 days. Thanks for sharing your list. Good choices without breaking the bank IMO.
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Charlie