The reef is around a mile off-shore, and if you're comfortable with that distance then go for it. Take a sea anchor with at least 20' of line, and have the paddles attached to the kayak by line - I have lost three paddles when guests rented kayaks and lost the paddles (yes, they had to be rescued and the kayaks taken in tow). A cell phone that is known to work is a good idea, in a waterproof bag. A brightly colored flag is also a good idea, as lots of boats pass up and down at high speed and a kayak or swimmer is not that visible.