Don't know the reason you want particularly to go to B-Line, but you might consider instead Foxy's Taboo..in Diamond Cay near Sandy Spit, especially if like later this week there is a North swell. Rather unusual this time of year, but I'm sure the younger crew would enjoy the Bubbly Pool with the swell. It's a short hike from Foxys Taboo. The food is really good, killer fish dishes and pizza, nice staff, reasonable drinks, great breeze. It provides a great spot for those not wanting to hike to the Bubbly Pool to hang out. Now if no north swell the pool and the trail up to a great lookout spot for photos will still be there but not bubbling. . Enjoy your trip !