Hi Sarah, welcome to planDisney!
You've chosen a great time to visit the
Disneyland Resort! Many amazing experiences are returning in April 2022, so your timing is perfect! Something my daughter is really looking forward to is the return of the traditional character meet and greets, which is happening as soon as April 18, 2022! That means Mickey and his Pals will be ready to give out the warmest hugs and sign your autograph books! And that's not all, the
Main Street Electrical Parade and
Disneyland Forever fireworks at Disneyland Park and
World of Color at Disney California Adventure Park are all returning on April 22, 2022! You'll be able to enjoy them all!
Now back to your
theme park ticket question. You can certainly upgrade your one-day park hopper tickets to two-day one-park-per-day tickets. The easiest way to do this is by visiting the Disneyland Resort Main Entrance Ticket Booths and having the fantastic Cast Members help. However, since you're all the way in Texas, that might be a bit difficult. I suggest you try calling the
Disneyland Resort Ticket Line at 714-781-4636 and see if the Cast Members there can help!
I hope you have the best time on your upcoming trip making lifelong memories!
See ya real soon!
Jin