We camped at these walk-in campsites #31 and #32 in August. Beautiful. (There are more sites which are not on the map.)
#32 from phone:
GPS Latitude : 42 deg 4' 24.00" N
GPS Longitude : 113 deg 42'51.00" W

#31
GPS Latitude : 42 deg 4' 21.00" N
GPS Longitude : 113 deg 42' 52.00" W

"Monument Veeneiken". Seven ancient oak trees found in the ven (buried for 7000 years) and now mounted vertically.