Nice spot near the river
There are ~5 dispersed campsites on this side road off the main North Fork Teanaway road. Some maps show this side road as "Loop Camp 973725".
I think this site has the best river access, but a couple of others have better distance from the main road. However, I think this site is far enough from the road. Noise and dust from the road were minimal.
It's plenty large for tenting, or a truck camper. I wouldn't bring a trailer, other than a very small one. There is a fire ring, but no fires allowed at this time of year, unless you have the propane kind.
The sounds of the river are nice. It's a mild scramble to get down to the river, but worth it. The water was clear and cold. Very pretty. No fishing allowed, but the river is shallow so I don't think there would be anything to catch anyway. On a hot day, this would be a nice spot to park a chair in the river and soak up some sun!