I have previously wondered about printed handkerchiefs and bandanas that functioned as backup maps. Invest in my kickstarter!

https://truenorthmapco.com True North makes a great bandana sized map of the BWCA areas.

That's a great idea!

(Mildly amusing, I first read 'printed handkerchiefs and bananas'. Like paint your map on the skin of your apple, or the shell of your hardboiled eggs.)