We did it just fine last time but our flight didn't leave until 9pm.
My advice is just to not push it with the rides if it's getting late. We were on LwTL on our last trip and it broke down and a woman with her son was flipping out because they had a flight home to get too. She kept trying to get off of the boat and he CMs kept telling her to sit down. She eventually grabbed her son's hand and got off the boat running into the greenhouse with CMs trailing her. Not a plan I'd recommend.
My advice is just to not push it with the rides if it's getting late. We were on LwTL on our last trip and it broke down and a woman with her son was flipping out because they had a flight home to get too. She kept trying to get off of the boat and he CMs kept telling her to sit down. She eventually grabbed her son's hand and got off the boat running into the greenhouse with CMs trailing her. Not a plan I'd recommend.