As I recall (and my recollections are not always correct) you can pay an extra charge for the Venice Card that will than include bus transportation from the airport to the Piazole Roma. From there you can use the vaporetto, keeping in mind that you will be carrying your luggage. The only problem is that the add-on cost to add the airport to town transportation is a break-even propostion as opposed to just buying the bus fare. As to transport to the port, again you can use the vaporetto, but it does leave you with a walk. All this is fine as long as you can handle your luggage..keeping in mind that you might have to lift it up over some steps. I should also add a personal observation. The best way to see Venice is to simply walk. The vaporettos are useful for getting from one part of town to the other, but you do see a lot more by just walking the narrow streets. Unless you are planning to use vaporettos to go to places like Burano, Murano and Lido, those passes are not always a good investment. We once bought Venice passes, and hardly ever used the things...so it would have been cheaper to just pay for a couple of vaporetto rides.