I am going to assume CA equals California Adventure or DCA (Disney California Adventure)
Since you do not have access to the Early Magic Hour (EMH), I would visit DCA on Saturday since DL will be having its EMH and then visit DL on Sunday since DCA will be having its EMH.
Which means I would recommend changing your Plaza Inn reservation from Saturday to Sunday or just cancel it all together and grab a small breakfast before you visit the parks as the first 3 hours of an 8am opening are most important.
Use the Child Swap or Single Rider where it makes sense for you.
Use the official
Disneyland App to check FP return times.
DCA on the 15th
730am: Arrive at the entrance to the park 30 minutes before it opens to the public.
745am: You should be inside the park at Buena Vista Street waiting for the park to officially open. Stay at the rope drop leading towards Soarin Over California.
8am-930am: Grab Fastpass (FP) for Soarin as soon as the park opens, then head through Grizzly River Trail towards Paradise Pier and ride Toy Story Midway Mania first, followed by California Screamin, Mickey's Funwheel, Symphony Swings, Goofy's Sky School, Jumpin Jellyfish, and Golden Zephyr. Save Mermaid for later as that attraction rarely has a line at all.
930am-11am: Before you use that FP for Soarin, grab FP for Frozen Musical, then FP for Radiator Springs Racers (RSR), then use FP for Soarin, grab FP for the World of Color, then ride Grizzly River Run.
11am Lunch or go back to the hotel
If you go back to the hotel , just make sure you can come back in before Tower of Terror FP sells out.
DL on the 16th
730am: Arrive at the entrance to the park 30 minutes before it opens to the public.
745am: You should be inside the park at Main Street. However, this time, you want to be as close to the rope as you can.
8am-930am: As soon as the rope drops head towards the castle and ride Peter Pan first. If it looks like a line longer than 30 minutes has build up skip it. DO NOT trust what the wait time says at the opening. It starts at 30 minutes. After Peter Pan, ride Dumbo, then Alice in Wonderland, ride Matterhorn after only if you do not want to use the Single Rider line later, then Casey Jr, Pinocchio, and Snow White.
930am-1130am: Ride the Jungle Cruise, Grab FP for Indiana Jones, then Big Thunder Mountain, Haunted Mansion Holiday, Pirates of Caribbean, grab FP for Space Mountain, use FP for Indiana Jones.
1130am: Lunch
1230pm-4pm: Head toward Tomorrowland. Before you use the FP for Space Mountian, grab FP for Star Tours then another FP immediately for Buzz Lightyear Astroblaster, use FP for Space Mountain. Now you play the waiting game until you can use your Astroblaster and Star Tours FP. DO NOT ride attractions like Nemo Submarines and Storybook Land. They will have lower lines once night comes. Attractions like It's a Small World, Autopia, Matterhorn Single Rider, and the Tiki Room are perfect attractions to visit while waiting to use FPs.
4pm Go back to the hotel and come back at night when you are ready. Big Thunder Mountain FP is a great one to get as the night ride is a bit better than the day ride.
Hope this helps,
ME