You'll be in great shape all the way. About 50-ish miles out of Reno you'll see signs for Hwy 20, take that straight into Nevada City/Grass Valley CA. Well, it isn't straight but its a perfectly fine road for an RV like yours. And spectacularly beautiful.
IIWM&I was in the neighborhood of Rainbow Lodge
, (530) 426-3871, near lunch time I'd check if they are open, pull in & put on the feedbag. They have have a fabulous little spot by the American River which should still be running nicely in August and you should be able to eat outside, maybe even by the river. If they are not open, I'd pull the moho into the parking lot, and picnic by the river anyway.
And if you hang out in California very long, we give you the opportunity to start tithing your income to the State in the form of taxes. Its one of the inimitable charms we are known for the world over.