Maybe there could be some "Trail workers ahead" signs or the like made as well?
Got'em. Have had a bunch of them for years. Here at the house, and others have them as well. We used them several years ago, but when FATS started getting built, well, trail work at the normal trails got back-burnered and the numerous signs got pushed to the back of many shops/garages/etc. They are out there. Maybe I will showcase a few at Horn this weekend.