lara consider renting a car and touring island and trying many of the different beaches on the island. Some are less crowded (Baie Longue) deep white sand, some red sand (Baie Rouge) Grand Case has several beach places to eat drink with toes in the sand (Calmos, Rainbow to name 2).

Friar's & nearby (walkable from Friar's) Happy Bay are beautiful. You can rent chairs there and food is offered.

Waves at Maho Beach and Rosies has great ribs.

Anse Marcel has a lovely beach and a thrilling ride up & down hill to get there. From this road is a beautiful view back to Orient Bay.

Karaketer's and EL Zafiro have free loungers if you eat/drink at the location. Long white sand beach with view of Saba island. The rode there runs along side the airport and you can watch planes land/take-off. A nearby place Sunset Beach Bar has gotten mixed reports and you pay to use their pool. Beach along side is small.

Even if you don't rent a car for the full stay consider 2 or 3 days to see what SXM offers.