My friend lives in Long Beach, CA and has been begging us to visit for years. However, with our family size, flying isn't an option. We already have a WDW trip planned for next year, but I'm thinking about a road trip from TN to CA and back for 2017, hitting lots of the tourist sites along the way. I'm planning a day at DL and one at CA in the middle of our trip. Is one day per park enough? Should we do one more and split it? Our kids would be 9,6, and 4, by then.