Hello there, Ruth! We are so glad that you have stopped by planDisney with your question for your upcoming visit.
I'm happy to share that you are able to visit a park more than once a day. A
valid theme park ticket with a
theme park ticket reservation does allow in and out privileges as long as the park has not reached capacity. While the parks could reach capacity, I haven't heard of this happening anytime recently. Usually, this is only a possible issue around the holidays, like Christmas Day. If you have a Park Hopper, you can enter the second park after 11:00 a.m., and then go back and forth. There are many Guests who leave the parks around midday to rest and recharge or visit the Downtown Disney District.
I hope you will find some time to visit
San Fransokyo Square at Disney California Adventure Park. This newly imagined area is really neat. I was able to visit this week before it was officially open and I am excited to go back to see Baymax. I stopped by Lucky Fortune Cookery for the Pork Wonton Nachos and I would definitely get them again. I also tried the Baymax Macaron and it was the perfect thing to share with my friend after our meal.
Ruth, thanks so much for stopping by. If you have any other last-minute questions for us, be sure to stop by again!
Carrie