Lots of places to camp up and down forest service road 580. The further you go down the road the less people there are. This place fills up with whitewater boaters and river rafting companies starting Labor Day Weekend and for the month of September. Water is released from Rimrock Lake making the Tieton River turn from a lazy creek into some Class III+ whitewater rapids. I have been camping and guiding rafts just down stream of this exact spot since 2007. I have hiked all over the area and around Rimrock Lake. I know where some cool waterfalls are and how to get to the top of goose-egg mountain. Book a trip with Alpine Adventures and maybe I will see you on the river. Drive up to the airport and check out the lake, it's a special place.
The area around Rimrock Lake was the fall hunting grounds for the Yakima Indians. Goose-Egg mountain and the surrounding area is a sacred place. Every fall Indian tribes would gather here to hunt, trade, play music, and share stories. People still gather here every fall and celebrate the river, sit around camp fires, eat food, and tell stories.