I spent 11 nights backpacking in Glacier National Park this summer (on two separate trips), and noticed that existing mapping of the campsites is minimal. Each site generally consists of several tent sites, a food preparation area with bear-proof storage (a pole for hanging or a bear box), a toilet, and usually a fresh water supply. Usually there is a schematic map of the campsite posted, like this one shown below.

While I was there, I took a number of photos of camp site maps (I have not been able to find them online from the National Park Service), and did quick GPS surveys of a few sites with my Garmin watch.

I have made a first attempt at adding a full backcountry camp site map for Hole in the Wall Camp in this changeset. My approach was:

• Place the camp itself at the main trail junction, usually where the camp map is posted, tagged as https://wiki.openstreetmap.org/wiki/Tag:tourism=camp_site. This is the way camps are tagged in OSM now (locations are rather approximate).
• Map the paths between parts of the camp, tagged with highway=path
• Add each official tent site as a node tagged with https://wiki.openstreetmap.org/wiki/Tag:tourism=camp_pitch
• Add the toilet with https://wiki.openstreetmap.org/wiki/Tag:amenity=toilets. In the case of Hole in the Wall, tagged with toilets:disposal=chemical, but in most cases it will be toilets:disposal=pitlatrine.
• Tagged the food preparation area with amenity=bearproof_storage, bearproof_storage=hang. This one is not very standard, I followed an example from this forum post.

A few notes and limitations:

… See full entry

Several important public land areas in the Inland Northwest are entirely missing from OSM:

• Idaho Panhandle National Forest (jointly administered Coeur d’Alene, St. Joe, and Kaniksu National Forests)
• The portion of Colville National Forest east of the Columbia River
• Salmo-Priest Wilderness

All of these are available from forest service data.

Missing state park boundaries include:

• Mount Spokane State Park (Washington)
• Priest Lake State Park (Idaho)
• Priest Lake State Forest (Idaho; exists only as a point)