Welcome to planDisney Amber!
It sounds like you are a planner. I am one, too, so I know how important it is to plan "just in case!" I use
Disney MagicMobile Service on my phone almost exclusively to get into the parks, but I always have a back-up "just in case" my phone dies or other issue. I always keep a
MagicBand with me or stop by the front desk of my
Disney Resort hotel to get card. My Apple Watch is also linked, so I have so many back-ups, I am ready for anything!
Regardless of how many back-ups you have, all are interchangeable during your vacation. You will know fairly quickly which method you prefer to use and will probably stick with it. But I feel better knowing I can tap into a park with a card if my battery is running low on my phone.
Speaking of "just in case," have a bag packed for your theme park visits. Toss in cheap rain ponchos, sunscreen, a phone charger, and hand sanitizer. These little items can be costly if needed in the parks, so having them in your magic bag is helpful. I feel like Mary Poppins sometimes with all the things I can pull out of my tote bag in a moment's notice!
"Just in case" I haven't mentioned it, I hope you have a magical visit to Walt Disney World!
Cathy