3. Pack lots of snacks

On busier days, it's possible to get into a theme park as early at 7:00 or 8:00 AM.  Sometimes, parks like Magic Kingdom don't close until after midnight.  Even if you plan for three full meals during the day, chances are you will still find times in between meals where you will be hungry and need a snack, especially in the afternoon or later in the night.

Luckily, Disney allows guests to bring food into the parks.  Although you wouldn't be able to bring your large ice chest and have a full picnic in front of Cinderella Castle, it is easy enough to throw some snacks into a backpack.  The best options are non-perishable foods like chips, crackers, and pretzels that can also easily fit into a baggie.  Other great options are healthier foods that can provide energy during the day like granola bars, fruits, and even carrot sticks.  Although you can certainly buy many (delicious) snacks in the parks, bringing your own food saves money and time standing around in lines.  Plus, it's convenient if you want to snack on something while waiting on a long line or are waiting for a show to start.  

It's also a great idea to bring a reusable water bottle.  Although you can always ask for a cup of water from a quick service restaurant, it's more convenient to carry around your own bottle so you can take a sip whenever you get thirsty.  There are plenty of water fountains located around the park (including by most restrooms) so you can easily fill it up without waiting in line.  It's very important to stay hydrated during such a long day in the sun, so make sure to take plenty of drinks during the day to avoid getting sick or dehydrated.

4. Pick an appropriate wardrobe

One of the best parts of staying in the parks all day is never needing to go back to your hotel room.  Because of that, it's important to dress in layers, especially in the winter time.  Although you may not believe it, Orlando does occasionally get cold, especially at night. If you are planning on doing the ultimate Disney day, check the weather forecast and consider bringing a light jacket with you into the parks.  Either throw it into a locker or tie it around your waist during the day and put it on when the sun goes down.  No one wants to watch the night shows cold and miserable.

Also check the forecast and see if there is going to be rain sometime during the day.  If you are visiting during the summer months, you can pretty much guarantee a brief shower between 2:00-4:00 PM. Pack a rain jacket, poncho, or umbrella with you and have it handy.  Also, consider bringing an extra pair of socks and shoes, because it can take a while for them to fully dry.  Whatever you choose to bring or wear, it's better to be prepared than wish you could go back to your hotel for a jacket or dry clothes.

What do you do to prepare for the ultimate Disney day?