We are planning a snorkel trip from Key West to key Largo to Miami. We just plan on staying on route 1 until Key Largo, and then whatever is the quickest way to Hampton Inn Blue Lagoon for 1 night and fly back home next day. One lady that I spoke to on a transportation board said that I wouldn't have any tolls. I called back a second time and the next person said to purchase sunpass from car rental agency for the week and then I don't have to think about it. Obviously, I don't want to buy something not needed. Now I am totally confused.