I'd love to hear what worked and what didn't on your list, and about your trip.
I'm sure others would also.
I've one grandparent immigrated from Sweden. A trip to see the family farm has been on my travel list for ages. Well, two more grandparents from Norway, and it and Sweden were one country for a while, so lots of ancestors there.
On hikes similar to what you are doing, I found some sort of sealed plastic map carrier hanging about my neck worked well.
http://www.cabelas.com/product/SEA-T...A&gclsrc=aw.ds
to show you the idea, but actually I used a heavy duty zip-lock bag with holes punched in the edge beyond the zip. A long shoelace knotted at the holes. And it hung about my neck quite nicely.