I would agree with Dan K2JB. Just a quick look at the map shows that most of the AT is nowhere near a populated area. 2M might be nice to chat with other hams on the trail, but if I was planning on activating a SOTA site, I’d take an HF radio.
If you need 12V to charge an HT, there is a company on Amazon called DROK that makes a lot of buck/boost converters that are small and quiet enough to boost 5V from USB up to whatever the HT needs.
Good luck
Dave AA3EE