Flaw in the plot

So we are to believe the crew after knocking out Kong with the gas bomb, somehow managed to get him on the ship or on a raft, all the time he remained asleep. Then after they arrived back in NYC, the crew continued to keep Kong asleep while transporting him off the boat and were able to keep him subdued all that time until the Broadway show? This makes no sense. It would have been better if the crew escaped off the island and Kong jumped into the ocean and swam after the ship and came onto land from the NY Harbor and terrorized the city. Kong could have also fought a giant sea monster in the ocean while swimming after the ship en route to NYC