The other concern had more to do with our inexperience with photographing in the rain.
We had four cameras:
Sony Alpha A7II, Sony A6000, Panasonic LUMIX GX7 and Panasonic LUMIX GM1.
Only the A7II is some how weather sealed. We ended up using a couple of methods to protect the cameras while shooting in the rain:
zip lock bags and ponytail elastics bands. There are plenty of tutorials on the web on how to use these.
and a small umbrella for my girlfriend.
I brought along a few microfiber cloth to remove water droplets from the front element of the lenses.
Finally, I never use lens hoods, but in the rain they make a huge difference in keeping rain drops away from your lens.
It was very important to have a smart phone with a data plan:
the data coverage is really good everywhere. I rented a car with a GPS, but the GPS (a Garmin) could not find half of our destinations by name. I ended up using Google maps on my iPhone all the time. It worked perfectly. I bought 800mb of data with AT&T and used less than half of it for Google maps and emails.
If you have an unlocked device you can get a local prepaid sim, Vodafone or Siminn.
we packed and used hiking boots (waterproof), hat and gloves and dressed in layers, in my case t-shirt, sweater (or two, because I’m always cold!), warm jacket and rain proof jacket on top. We also packed, but never used, waterproof pants.