Yet another great mapping resource -- NFS topo PDFs

I use a dedicated Garmin GPS (Montana 600) with topo software and then research certain areas where I may not have a cell signal before a trip. I use ExpertGPS if scanned topos are needed. If you have an android phone there's' an app US Topo Maps Free or Pro ($) That's a great program even if it sometimes crashes on my older android system. When I get a new phone I will pay for the Pro version. Many of the newer topos seemed to be sanitized for your protection.