If you have to pack and stash water like I do these to go drink bags from Amazon work great. They’re light weight and if one pops or someone steals it I’m out a couple bucks and an extra hike vs $40+ for a dromedary.
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I also concur the victrinox paring knife is great as well as the dexter Russell veggie knife. A little tip is the flexible cutting mats from Walmart that come in multi packs make great ghetto kydex and come in bright colors like yellow to make light cheap sheaths.
For rain gear some of the lighter Grundens stuff is my go to. I spend enough time outside as a forester that I’ve seen almost every cloth type rain gear fail so for days when I know it’s going to be nasty all day I take non permeable rain gear and just pace myself. The other trick we use is just long johns under your rain gear and keep your pants dry in your pack, it increases mobility and helps control body temps better.