Back to the OP's question - we have enjoyed going to Secret Harbour for the day. It's going on 4 years since we've been there so I don't know if this is still accurate, but we were able to rent loungers, eat, and drink there. The first couple times we could plunk down anywhere but the last time they had an area on the side for non-resort guests. Check their website, there may be more info. The bay is beautiful, decent snorkeling, and not crowded.