Eryn, so you can do more, and not get so tired, as was said, rent (I think they are free, but with a deposit) a wheel chair, and ask at guest services or guest relations, about being able to jump to the head of every line.
Don't feel bad about doing it, It's no big deal. They have a wheel chair access line everywhere. People understand if you get out of the wheelchair, and walk 10 steps to get on a ride. Doing this, also enables everybody in your party to also be able to be with you.
I know this is crude, but you know how I am by now, and I am gonna just say it. My husband says that next time we go, he is getting a wheel chair!! I told him to be sure to get an electric one, and me and daughter can sit on each arm, and let him drive us everywhere!! Your friends and family will love you a little bit more, if thats possible, for getting them into and onto the attractions, without standing in lines!!!
I hope you have a wonderful time, I have been there 1 time, and Disneyland 5 times. It is magical, even at my age!!! Don't bother spending more that 1/2 day at the Animal park. Get in, and Get out. Seen one giraffe, seen them all. (Seriously) See the shows there, ride the dinosaur ride, It's been 4 years. Do not ride the bus or truck with lots of seats, whatever it is, to the back country. It his a chug hole, and my butt rose off of that seat 2 feet, and hurt my back. For what?? so I could see the ears and half of a head, sticking out from behind a big rock. Go to a zoo instead. There are so many more fun things to do in the other parks!!!!!
Damn, I wish I could go!!!! If you or anybody else, who wants to really plan your trip, to Disneyworld, Buy Disneyworld for Dummies. At a bookstore, in your town. I also bought Frommer's, but the Disney for dummies, was by far the best. That is all you need. It tells you what not to miss, what to avoid at certain times of the day, what to start with, as you enter the park, to get the most enjoyment. I brought it along, in a huge fanny pack, and had notes and items already highlighted with a marker.
I think it made a world of difference!! Have fun !!