2- You can also save maps as images in your cell phone. It's convenient and good backup. But paper maps should be there too ( one copy for your husband too).
+1. If you have an Apple or Android phone you can also save maps for offline use now. With the maps saved to memory the smartphone doesn't rely on the network for map data and functions like a standalone GPS unit. You can save a pretty fair size chunk of real estate to memory that way.
Snapping a picture of anything from a map to a shopping list has been a quick, easy way to take information along ever since cell phone camera resolution jumped into the megapixels.