No need to unhook the toad. Very clean park and facilities. Very easy to access from the freeway internal roads to sites have plenty of room. Very pleased with the park, the help and will stay again when we pass through. They offer discounts for many RV associations which gets the rates into the normal realm for the amenities offered. As others have said the park is new and looks it, someday the trees will grow and be very nice, but for now expect clean gravel interior roads and sites with grass in between and no trees. There is some freeway noise as it is right near the freeway but has a hillside as a buffer so the noise was muffled very well.
No need to unhook the toad. Very clean and new, sites are roomy enough with tree bark in between each one. If you pick a site near the entrance you will hear freeway and the truck stop so go toward the rear near the golf course if you want more quiet space. The casino is an easy walk or take the shuttle, we had dinner at the steakhouse, very good. Easy access from Hwy 5, would definitely stay here again for an over nighter.
Gravel and dirt interior roads 35 - 38' rig would be about the limit for the site length. This was a decent place to stay in an RV, but not a campground feel if that is what you're looking for. Mostly a big gravel parking lot with hookups. Stay away from the full hookups unless you do not mind having very close neighbors. The water and electric sites are decent size. Close enough to downtown Napa for easy driving access and quiet at night. Has nice gardens and some nice walking hiking, popular for mountain biking. No fees for reservations, just call and tell them your coming, that is all they need to know.