I've tried hiking with a phone setup and yeah, gimbals get old fast when you're already carrying gear. For what you're actually doing - hiking vlogging - a compact tripod with a phone clamp is way more practical than you'd think. Something like a Gorillapod or a small flexible tripod weighs almost nothing, packs down tiny, and gives you solid stabilization without batteries or motors to worry about. You can wedge it into rocks, wrap it around branches, or just set it on relatively flat ground. When you're walking between shots, it takes maybe 30 seconds to pack up, so it's not slowing you down.
The other solid option is a simple phone rig that mounts to your backpack shoulder strap or chest. These are basically L-brackets with friction arms - they cost like $20-40, barely weigh anything, and let you get POV footage while moving. The trade-off is you're limited to that one angle, but for hiking vlogs it's actually pretty natural and keeps your hands free. You might also add a basic phone stabilizer grip (not a motorized gimbal, just a counterweighted handle) if you want smoother walking shots without the bulk of a full gimbal.
The reality is for hiking specifically, the best setup usually isn't one thing. Throw a cheap flexible tripod in your pack, maybe grab a shoulder strap mount, and use your tripod for establishing shots while you're taking a break. That combo stays lightweight, doesn't die mid-hike, and honestly looks better on camera than shaky handheld walking footage anyway.