Dreaming is a feature overseen by Luna the Tapir. By sleeping on a bed in your home, you will be able to visit the islands of other players! In order to do this you'll simply have to slip into any bed in your house. Since Dreaming is an online activity, you will not be able to access it at points when there is an ongoing Network Maintenance. You will simply have to wait for the maintenance to end before you can continue Dreaming. Perhaps the most important thing to note about this feature is the fact that you will need a Nintendo Switch Online (Paid) subscription to use it. You can learn more about this membership from the Nintendo official website. When you speak to Luna you'll get the above 4 options. To simply visit other islands, the first option will suffice! To share your island with others, you'll need to choose the second option and register it. In the Dream Suite, it's not possible to play with other people simultaneously! The Dream Suite is fundamentally a single-player experience, whereas regular travel via the Airport is not! This is arguably the biggest difference between the two. You can also add certain islands you visited to your favorite list by pressing the "x" button. Use this function for easier access to your favorite islands! When players explore your island, they will be able to speak to an avatar of your character. When they do so, the message displayed in your passport will appear! Go to your passport and change the top comment in order to set a custom greeting for visitors! Once you've started dreaming, the only way to leave an island is to return to the bed in the central plaza and lie on it! That's all there is to it!