Not sure BIL is doing it. I think he said 22ft. cat. with 90 hp.
That's not that small. I was thinking like a 16 or something
You are a little further up than I stay. First, like I said get a top spots map. They are available at any bait shop. it will have spots for diving, fishing, etc...
Contents might be a little bit far with a single 90hp, but its still the easiest place to lobster. buy a cheap kit(stick, net, measuring device, etc...) at any store, make sure you have gloves as well. If you are in the keys for lobster season and have a boat, this is really a must do and you can make it one of your snorkeling/diving days.
The map should put you on some easy mangrove and yellow tail spots. I have found yellow tail is the easiest to fish for, closer to land and you with usually get some mangroves as well. Just ask what the best chum at the time.
Hit up some of the dive spots you see on the map as well.
The FL bay side will be the most calm seas wise, but be careful, weather can pop up quickly