We stayed at Anaheim RV park over the summer and were satisfied. The fireworks are impressive from there and there's a Walmart market just down the street for supplies. The shuttle service is handy but three kids is the break even point cost-wise to drive and park, and we thought it was a bit more convenient to skip the shuttle - it's less than 5 minutes to drive and you can leave and come back during the day with your parking pass. Three kids and a double stroller is easier to deal with in your own truck, imo.
The park felt safe and was clean. That type of density isn't my idea of camping but once you wrap your mind around the fact that you're basically using it as a hotel it's fine. There are lots of grass areas for pets.