Yes ! You can the bus stop is at the resort . As long as you stay at the resort it's free...
Yes it's far, Around 35 minutes or maybe more with Uber 👍🏻
It's about 20 miles from Cabana Bay to The Magic Kingdom at Walt Disney World. Other parks like Epcot or Animal Kingdom may be longer. You will have to arrange your own transportation, like a Taxi, Lyft or rental car to get from Cabana Bay to somewhere at Walt Disney World since Universal only provides transportation on Universal Orlando property.
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