I would scratch Dunns off the list... yeah,Roaring River's Blue Hole is pretty sweet- hiking, caves, etc... the "other" blue hole is really not that adventerous. Want a take a nice walk- try walking from the west end/Lighthouse to the Westender Inn, from there you can eat and catch a ride back. YS is pretty cool- maybe group that day with a trip to the Pelican Bar? day trips maybe Half Moon Beach or Rhodes Hall- both are quiet relaxing private beaches, etc... Head up to Bentley's Crab Shack for a night's meal- make sure to go a day early and give him a heads up so he can prepare. Have fun!