The wife and I (no kids) did Disneyland/California Adventure last month, but we hung around Anaheim mostly, using lyft for transportation further than walking distance.
A few things that may help:
- For us the park hopper passes made sense, the two Disney Parks are basically the same property
- If you're at the parks early, hit up California adventure and grab fast passes for Radiator Springs or Soarin' Over California first thing in the morning... or you may not get on
- Off Disney property, there's actually decent competition (and pricing) for bottled water/sunscreen/souvenirs/snacks in the immediate area. CVS/Walgreens/7-11 etc... stock up on snacks off property
- Lyft/Uber rides are readily availble
- In 'n out burger is worth the lyft ride there
- Anaheim Marriott (at the convention centre) is a bit of a walk from the park, but a very nice hotel. We watched fireworks from the park while laying in bed one night. There's bus transportation direct to the parks to help save the kids legs for the park.
- Bring money
- No really, bring money