Family friendly beach/adventure destinations

Looking into a few different options for my 40th. Thinking we will celebrate in the winter when it’s a little more dreary and cold where we live. We love the beach and outdoor activities. We might travel with my 8 year old son. Haven’t decided yet. He loves water slides and we want to take him snorkeling, mellow hiking, etc. I’ve thought about Costa Rica, but think that might be a lot of travel for just 5-6 days with all 3 of us. Key Largo and Baha Mar in the Bahamas have crossed my mind as well as Bermuda, but Bermuda looks a little pricey. Specific resort recommendations would be helpful! We are pretty low key but would love a place that’s clean, relatively chill with easy access to great food. Thank you!