Nice spot but where'd the lake go?
Mona was about 2 hr 45m drive from Portland. Our campsite was shaded with a fire pit, bench and plenty of room for tents and gear. Dog friendly, which was a big perk. Water and toilet were a minute or two walk. Markets with firewood/ice/food were a decent drive away, so make sure to have all your gear or stop on the way in. Experimental forest was a relatively short drive and Carpenter Mountain made for some amazing hiking and views!
One big complaint-- we went in early August (booked in June) and planned to do some floating. Got a call a week before the trip that there would be restricted boating. Didn't know that our lakeside spot would be reduced to a small river. So be aware that depending on time of year, the lake may disappear.
Otherwise, great spot.