I use mainly computer maps. Currently my most used are the NatGeo topos for Montana state or Glacier Park -- with this you can look on-screen at just about any scale any place in the state, as well as print off areas for hiking reference on the trail. I also use Oziexplorer, which can work with any downloaded USGS topos (Montana from the MT topo finder website). With this you can also scan any map, such as handout paper maps which then have to be geo-referenced with two or more coordinated points on the map.
If you have a gps, there are lots of free maps on gpsfiledepot.com, including transparent maps of trails, roads, property boundaries, hunting area boundaries, etc which can be loaded into a gps to display over either topo or road maps. Of course, the gps company will have maps for sale for their specific receivers. Garmin, for example, has 100k and 24k topos and road maps that the user works with via the program Mapsource. The free maps from gpsfiledepot also are loaded into Mapsource, altho' that program won't handle the transparent overlays......those have to be loaded into the gps to use as transparent overlays.
So, lots of options......many hours of fun if you're a map freak like me!!