I have a slightly more modern spin on mapping I think should be emphasized especially in the US. Making a map takes a really long time and thus many areas lack a large number of forest maps. Around Calgary we have about 10 forest maps, and thats it. Compared to places like West Point and Europe this is a tiny amount, and every map take a year or so to get done. https://viewer.nationalmap.gov/basic/#productSearc...
I highly recommend using lidar that is provided for free that covers half of the US. If you process the data through kartapullatin then it generates an orienteering map with: vegitation, cliffs and contours. It does not pick up rocks, water features, trails and fences etc...http://routegadget.net/karttapullautin/
If you pick an area that is mostly forest and does not have many rocks you can make a pefrect map with no effort and go run on it. The process is very fast and efficient, making it useful for making training maps or maps that are 80-90% accurate depending on the features present.
Also it takes no skill to do. Very little programming knowledge.
The process is get a .laz or .las file and drag it into the kartapullatin executable after you download the program.