I am planning on hiking significant portions of the pacific crest trail and setting out on a full excursion in the next year or so. What gear should I bring?

I immediately thought of something like a Pentax K1/k3-3 and the 28-105mm f/3.5-5.6. It would give me a complete weather sealed kit with okay battery life.

But I was thinking it would actually be ideal if I could find a film setup. I would save so much weight. No (significantly less) batteries, no laptop, no power banks. I would just stop off at one of the many towns along the route and mail the film out, have them developed and scanned then returned to my parents house. I can have the scans emailed to me and uploaded from my phone.

But I am open to any other good solutions, what is your go-to here? Remember single lens solutions only.