Our favorite for lunch and lounging is Cow Wreck. Ann is a joy to meet and super friendly. The beach is gorgeous and we love their lobster sandwich.
We've rented cars with Dean twice in the last year - he met us at the dock and then took one of our crew to his rental office to fill out paperwork and then that crew member came back and picked up the rest of us. While it's not a huge amount of time it does take away from the little time you have there if it's only a day trip. We're renting from S&K next trip - right by the dinghy dock.
We do like snorkeling at Loblolly when the current isn't too strong.
Sadly we've never seen a flamingo!