I use cell phone google maps, with backup paper maps.
If I am going to be out of cell range (often) I make notes to myself on an actual notebook, keep it next to me on the seat. 'L on 156, go 10 miles, R on 32' etc. Yeah, I am old school.
I also hate to use google maps on my computer. Even if I am doing something on the computer, like reading a trip report here that talks about a place I want to look up on the map, I pick up my phone to do it.
And I LOVE that I can type in 'tires' or 'Walmart' or whatever and see all the locations nearby.
Google is kind of weird about campgrounds, though. They miss some. And if you type in 'RV park' they also show you mobile home parks... which may or may not accept overnighters.