I used to live in Dorris, CA in the 70s & 80s and went to Orr Lake a few times as I can remember. The Bass fishing was great, I don't think I caught any trout but they probably planted some by now. If I can remember right, you better have some good mosquito repellant because at that time in the evening and at night they were pretty bad. But hopefully they will take care of the problem.
We stayed here in a Truck Camper.