Nice older campground you'll need a tent or smaller rig. If RV... bring leveling blocks... lots. This use to be First Come First Served but apparently it's reservable now. Getting it reserved is a website-mess though as you need to click on San Luis Reservoir SRA and then Los Banos Creek Campground. LBC doesn't even show up on the map.

https://www.reservecalifornia.com/

Sites:

1 - Good Off-season (No trees just a shade structure) - On Lake

2 - Ok - Very unlevel. Has shade structure view of lake over site 1

3 - Good Shady site, fairly level and large enough for 20' trailer / 24' RV - On Lake

4 - Good Shady site, fairly level and large enough for 20' trailer/ 24' RV - On Lake

5-9 - Ok Small, with shade structures. No obvious spot for tents but near Lake

10 - Ok Medium size and good for trailer with lots of leveling blocks... one tree for shade

11 - Meh? Small weird triangle parking spot with no obvious tent pad - On Lake and shaded

12 - Good Medium size, Lots of shade, On Lake

13-14 - Pull-throughs ? No Shade

Porta-potties were in great shape (March) to the point I'd rather have these than Pit toilets. Good Job to whoever services those!