A hand grinder is essential in the mountains; whether it's in Peru or Colorado. We travel with a hand grinder and an Aeropress, and recently combined the two in our Winter Session collab travel kit (here).
The Porlex mini is a compact stainless steel grinder with ceramic burrs. Ceramic does not dull, so you'll get quality ground coffee for a very long time, and with it's light weight you can pack it easily in and out. An easy to adjust grind mechanism goes from french press to finer than pour-over, so you can adjust for however you're brewing.