I booked at the Comfort Suites, but made my reservation through "BookIt.com". I've never heard of them before so I called the hotel in Nassau and asked about them and the guy confirmed that BookIt does reservations for them all of the time.
Our price is $149 for 2 adults. With tax, tariff and service fees the total came to $171.28 which we've already paid. We will have to pay the energy and housekeeping surcharges you mention when we are at the hotel. That brings our total bill to just over $200 for 2 adults, which is about $110 cheaper than if we booked through the cruise line. (Sorry Carnival.)
We'll be at Atlantis a week from today. I will try and remember to report back on here when we return to tell you how it turned out. Is there anything else you want information on that I can look for while we're there?
Also, I noticed that this Comfort Inn allows kids under 15 to stay for free with 2 paying adults. That sure would bring down the per person cost!
Carol