You've all given me so much to consider, thank you for your generous replies! I do believe Azamara docks first in Fusina, then shuttles passengers back to Marittima, but getting answers and info from them has proven to be very difficult. I'm afraid I won't get accurate or timely info if I try to inquire about self-disembarkation or the availability of private transfers at Fusina. I only hope our experience cruising with them is better than their customer service!
So, rather than cut it too close and be stressed about catching the 11am flight, we've re-booked on the 1:40 to JFK, then onward to CVG, on 4/27. The layover duration is tight at 1hr 40 mins but hoping we can make it since we aren't checking bags. We would've considered staying an extra night or two after disembarking but we're spending three nights in Venice on the front end and will be ready to get home by then.
I really, really appreciate your time and great insights...thanks, again!