We are going to find ourselves at the Atlantis Resort during a spring break (Mar. 12-18) and the Atlanis Resort says it will sells us a Guest Pass on first come first serve basis as we walk up to the window. Has anyone experienced, during a busy time at Atlantis, when they DID NOT have a guest pass to sell you, in other words they we're booked to capacity? This will save us TONS of money buying tickets on our own rather than through Carnival; hundreds of dollars. Thanks for replying.