I know this thread is a couple of months old, but to the OP (Eddie): If you only have 7 days, you might want to just sail around St. John, especially if this is your first charter and you have kids aboard. Possible itinerary could be:
Day 1 Maho or Francis Bay (walk up the stairs and get dinner at the Maho Bay Camp restaurant)
Day 2 Francis again (your kids might really like the beach) or sail around the point to Leinster. Hike up to the sugar mill ruins, snorkel around Waterlemon Cay
Day 3 Salt Pond Bay on the south side of St. John (go ashore hike to the salt ponds, do some snorkeling, too)
Day 4 Little Lameshur on the south side of St. John (nice beach)
Day 5 sail back to Leinster (you can get a taxi to Cruz Bay from the road near Mary Creek and enjoy a nice dinner "in town")
Day 6 Christmas Cove (good snorkeling and close to Red Hook for last night)
Day 7 Back to Red Hook...
Yes, it's not much sailing... But sometimes you find a place and you want to stay more than one day or the kids get bored and want to snorkel, hike or play in the water...
Either way, you'll have fun!