Good morning. All subscriptions and renewals and emails have been handled as of 11:30 AM Aug 21.
The Anker PowerCore 20100+ charged fully-drained Sony A7R II batteries 4 times, as well as some iPhone 6s Plus time and still had half a charge left. No need for solar charging on a trip spanning only 3 nights—better to just take battery power than a solar panel.
The human element gives scale to outdoor images. I played it a little here: what else to do when tired after hiking for 13 hours up in that cirque?