the only roads that go to billy clapp are at the north end and the south end. no road on the east or west side gets to any lake access, and the land there is private. no camping is allowed at the north end, as the tiny "summer falls state park" is day-use only. and the WDFW access on the south end is also day-use only. since columbia basin irrigation water flows through billy clapp, the water level fluctuates throughout the year.