We are stopping in California on our way to Aulani but will only have 1 day to spend at Disneyland/California Adventure. We have never been there before. So are we better to just do one park or park hopper and see both??? We have been to Disney World numerous times. We are planning on doing dinner at Downtown Disney in the evening and then the park/parks the next day and fly to Aulani the next day. Open to suggestions.