Kick off the suggestions with somewhere in Plumas County.
Plumas County, Ca, has some of the finest roads and scenery in all of Northern California.
The Quincy-Oroville road (Also known as Bucks Lake road) in particular, and there's hundreds of miles of
very well maintained, deserted roads in the region that all link up quite seamlessly, no real "Slabbing it) sections yet plenty of fuel and food stops available.
Bucks Lake as really good cabin type resorts,
CLICK ON THIS LINK they have indoor plumbing in the cabins, fully stocked bar,great restaurant with inexpensive, wholesome food,and a small store.
There's a lot of cabin resorts in the area, all good value.
The roads are phenomenal, the loop from Oroville to Quincy along the CA-162 E, Oroville-Quincy Hwy and Bucks Lake Rd then La Porte and back around to Bucks lake is tops.
This is a really good ride, definitely in the top 5 in Nthn California.
It's got it all, scenery, little to no traffic, really well maintained, well surveyed ,smooth, fast twisty roads.
https://goo.gl/maps/jzrZshHgZR42