We've never vacationed in the Caribbean - we're staying on St. Martin in June with our 22 year old daughter, and I'm looking for input, tips, opinions and criticisms. I don't know if we're going to prefer quieter, more secluded beaches or more populated beaches with restaurants, etc. (we're non-smokers - not prudes, but not wild either).

We'd like to ferry over to St. Barths for a day. I figure we'd walk around Gustavia for a while and rent a car to beach-hop around the island. We may do the same thing to Anguilla - I'm trying to figure out if that would be worth it. If I could only choose one, I'd lean toward St. Barths because it's more mountainous and we enjoy the dramatic landscapes. I'd like to see the highlights while we're down there (while getting plenty of relaxation).

Current itinerary:
6/2 - Arrive at St. Martin, check into AirBnb and grocery store maybe catch a sunset somewhere
6/3 - (semi) secluded beach (Pinel Island or Friar's Bay?)
6/4 - Orient Beach
6/5 - Pinel Island Beach or Friar's Bay beach? Other? (may go back to Orient)
6/6 - Ferry to Anguilla, beach hopping
6/7 - Ferry to St. Barths, beach hopping
6/8 - Open (maybe repeat our favorite spot/experience)
6/9 - fly home

Is this a good plan? What are we missing? TIA for any help!