Hi Julia!
Welcome to planDisney.
All Walt Disney World Resort guests can enjoy full use of all the different Disney Transportation options - buses, boats, monorail and Disney Skyliner to visit the four theme parks, two water parks, any Disney Resort hotel, and Disney Springs.
Depending on which hotel you choose, you will have different options of Disney transport to/from your Disney Resort hotel. For example:
The Magic Kingdom Resort hotels have combinations of boats, monorail or buses to take guests around the Resort, and some of those hotels have walking paths to Magic Kingdom Park.
The Disney Skyliner serves Disney's Riviera Resort, Disney's Art of Animation Resort, Disney's Pop Century Resort and Disney's Caribbean Beach Resort to EPCOT and Disney's Hollywood Studios, with buses available to the other theme parks.
Some EPCOT Resort Area hotels are within short walking distance from EPCOT, but also have FriendShip Boats to EPCOT and Disney's Hollywood Studios.
Disney's Saratoga Springs has a boat service and a walking path to Disney Springs, with buses to the theme parks.
These are just a few examples, as there are so many options, and so many other hotels! If you look at the Overview of any Disney Resort hotel page on the official website, over on the right-hand side you will see your transportation options. There is always at least one form of Disney Transport from your hotel, and you are welcome to use all of them.
Please come back and visit us if you have any further questions. You can also send me a direct question if you wish. We will be happy to help you plan your magical vacation!
Sue