Walt Disney World has complimentary wifi across property. This covers you at the resort and in all 4 parks and 2 water parks. BUT this does not mean you should always be using it.
To maintain such good coverage Disney has had to install multiple wifi amplifiers (think cell phone towers) across the park. Your phone is constantly bouncing back and forth between them as you walk around. This constant hunt for a new wifi signal really draws on a battery.
This gets even worse if you are inside an attraction. You could eat through a lot of your battery just riding soarin. Let’s not do this.
My recommendation is to turn off the wifi until you need it. It is easy enough to turn on and off and your cell phone battery will thank you.
Wifi and cellular amplifiers are hidden in plain sight. An example of this is that there is one in the bell tower above the Hall of Presidents.
If you don’t need your cell phone to receive call or texts I would also recommend going to airplane mode. This options will save the most amount of power.
But I do understand that people will want to find each other using the cell phones so you will need to balance the needs of each signal. But do think about it, it is that important.