Those people who are unsuccessful in getting their anchors to hold in Boot Key Harbour have the choice of going to a marina or anchoring somewhere else. And those people who don't like being so close to other people also anchor out here.
When the wind shifts, everyone moves to a more protected location. This picture was taken as we left to go north.
Equipment: You need good ground tackle (anchor and anchor rode)
Since there's only one basic road on Boot Key and it doesn't go anywhere, it seems like a good place to do your exercise biking. Cruisers don't get a lot of exercise while they are on their boats due to restricted space. So a lot of them have bikes that they ride both for transportation and exercise.
Equipment: If you don't own a bike or you don't have a friend with a bike you can borrow, then you can rent bikes in Marathon.