I ‘ve spent most of my hiking years using a map and compass but then in 2000 I started using a gps unit in my work as a biologist. I then progressed to using an Android phone for downloading hiking apps. Over the years I hated seeing clear cuts and decided to do my bit by giving up paper maps. Currently I use Backcountry Navigator (will also be available on iPhone soon). For offline use I like OsmPlus which allows me to download an OpenStreetMap with contour lines for the entire state. I also really like Avenza Maps with many pdf maps available, including Forest Service maps and topo maps that can be used with the phones gps . By using my phone judicially I can get a full days use plus I carry a power pack for recharge if necessary .
It would take a few armloads of paper maps to replace the ones I’ve downloaded on my Android. Electonics is not my preferred method but saving trees is my priority. I will always have fond memories of my cherished paper map collection.