Buccaneer and El Zafiro are both still there, yes. For El Z, make sure there are no cruise ships in, as they do cruise ship excursions there. For kids, I think there would be a lot more going on at Buccaneer.

Loterie Farm has the zip lines, as well as a pool, restaurant, etc., but I assume you are talking about the zip lines. If they are active, they will probably love it there.

The market in Marigot will be open when there are cruise ships in town. For the cruise ship schedule, there is a link right here at the top of this page.

Enjoy!