I would only overnight one night at Anegada. You can then spend a evening in Cane Garden bay and have more time at Jost. If you rent a Moke you can easily snorkle at FOB or Loblolly bay and have lunch at Cow Wreck. You can’t over night at Jost, hit Sandy Isle in the morning and make it to Cooper without it being a long day. No way could you dive.
G