I stayed at this park for 3 months last year while having eye surgery, and found it very well taken care of. This year there are sewer fumes noticeable throughout the gravel area (not potty smells, but fumes); many dips in the gravel which became lakes during a rain. In a fairly empty park they assigned large motorhomes right next to me on both sides, making it difficult to park my truck, and many other aggravations. The location is excellent; the laundry room is reasonable and clean, but I hope I don't have to stay here again. Note: nightly rate is a guess. I paid $595 for the month, up $45 from last year.
I spent 3 months at this park, and paid a monthly rate which amounts to approx $18/night which included electric. Cal Expo is in an excellent location, close to every kind of shopping and easy to get to and from freeways. The office staff were very friendly and helpful, and contributed to a pleasant stay. This park has a limit of 30 days' stay, but can be extended for medical reasons. Wi fi is available in the office bldg only. I prefer a park that is clean, safe, and convenient, with a friendly staff, and this park would rate 100% in these categories. Someone who is looking for swimming pool, spa, horseshoe pits, etc. would be disappointed. I plan to stay at Cal Expo whenever I am in Sacramento (at least once a year).
Nightly rate is approximate, since I am paying monthly rate. I am currently camped at this park, having rented it for the month of April and am considering extending until the end of May. It is clean and well kept, and you can see the upgrading going on. The laundry room is immaculate and the most reasonable I've been in, and the rest rooms/showers are clean as well. The owners are friendly and helpful. The only drawback to me, with two dogs, is that the dog walk area isn't very big and I walk them there plus along the road for a little ways. This wouldn't be much of a problem with small dogs. Easy access from I-5; propane available between I-5 and campground. (NOTE: I pay monthly rate plus electric).