We're planning on spending several days around ST John at the end of our BVI trip.
We've not taken a boat through Customs in years, so we have some procedural questions:

1) After clearing out at Great Harbor Jost van Dyke, can we remain overnight before heading to Cruz Bay? Can we go ashore after clearing out?
2) Do we need to bring the boat into Cruz Bay for Customs, or just the crew?
3) I remember some discussion of where to tie the dinghy for Customs, but it escapes me.
4) When we enter US waters, do we need some sort of seal on the holding tanks, or is placing the valves in the closed position sufficient while moored?
5 Is there a good place to spent the night with easy access to Cruz Bay for Customs, and perhaps shopping and dinner?
6) any recommended dining spots?

Thanks for any advice or assistance