same price (which isn't cheap, but not that expensive like some people accuse it of being) there isn't an easier trip where I know my kids are having a blast. There is enough entertainment and things to keep me as an adult having a good time as well.
When my parents go with me they sometimes take the kids home early and my wife and I have dinner somewhere in the park. It's fun, but I can't imagine going on a vacation with Disneyland as the prime destination without kids.