Interesting thread.

I'd agree with the most common response- G-Shock 56**, one with band 6 and solar. Won't have to set it, worry about batteries etc. Avoid the reverse display, can be difficult to read.

If I was going to be including some potentially risky activities, especially alone, I would consider an Emergency. I'm not a snowflake, but heard enough tales of people who have lost their lives, when one of these would probably have saved them. If you're not, then get the G!