Biscayne in October

Hi! I’m taking a trip to Florida in a few weeks to visit friends who live about an hour from Biscayne. I’d like to spend a half day there doing some type of water activity. I’m looking for recommendations for either a boat tour, snorkeling, kayaking, etc. whatever would be the best way to spend a little time in the park and see as much as we can! We’re also going to the Everglades, and in terms of spending time, we are prioritizing that over Biscayne since there’s more to do there. Thanks!