You have some awesome trips planned. I’m sure your kids will have wonderful memories.
When in San Diego check out Mission Bay Park, it’s prefect for a picnic and family bike rides and for an great meal Lucha Libre taco shop.
Yellowstone gets deceiving cold at night so make sure you have extra blankets. Also some campsites offer restrooms with a sink specifically for dishes. We use Dr. Bonner Castile soap for just about everything when we travel. Depending on your route you may also be able to squeeze in the Grand Teton National Park for some nice hikes. Jackson Hole is a very cute town with an Elk preserve along the way.
Have an amazing time!