Yes, definitely. Atlantis is within walking distance from the port. A good walk, to be sure, but it’s manageable (about 40 minutes if you have a nice pace). You could also take a cab there or even a ferry from the port area to Atlantis.
Here is my blog post on Atlantis: Atlantis (Bahamas) Advantage Slot Tour
Baha Mar is quite a bit farther away from the port (eight or so miles in the other direction). I have walked there from the port before off a cruise (not advised). You’re better off taking a taxi. By the way, the Bahamas does not have Uber or Lyft. The cost should be between $20 and $30 from the port to Baha Mar (each way…ouch).
Here is my blog post on Baha Mar: Baha Mar (Bahamas) Advantage Slot Tour
Not much has changed at either casino since I shot those videos a year or so ago.
Atlantis has more advantage games and generally more competition, often from folks coming off cruise ships. I’d suggest trying to get off the boat as early as you can, walking or taking a taxi to Atlantis, and then getting a taxi to Baha Mar.
If you had more time, I’d suggest renting a bike, if you’re able to, from Cycles Bahamas. But assuming you’re only docking for part of one day, that would be tough to squeeze in.