Good luck with your explorations. We too keep a list of places we learn about on TTOL and decide which we will try. Re Marigot mkt, earlier is better than later for parking. You can always stop at one of the 3 pastry shops for coffee and a treat. We park facing the ocean. As you walk to the market you go past the huts where the fish market is, vendors selling foodstuffs and a couple who sell freshly made frozen fruit ices. All worth a stop

Also a Super U Fan, though I found the wine selection just OK and only so so for liquor - though I am a rum drinker. I found poor white rum selection and even worse for aged rum or rhum. For aged rum / rhum selection I found Bacchus to be very good as was the wine / liquor shop just west of Bacchus nearer the roundabout "Grapes"?

Have Fun
J&B