That is basically NPS policy nationwide; a key element is "personal use." Also, Point Reyes is a National Recreation Area - their policies in general are less restrictive than National Parks. Death Valley, Joshua Tree, Channel Islands, etc. are not known for mushrooms, although I am sure some are there if you look hard enough in the right places. Heck,with the abundant rains, there are even mushrooms sprouting on my property, something rarely seen.