I'll second Isle De Saints off Guadeloupe. That was a favorite stop of ours when we moved our boat from St. Lucia to the BVI. I'd also suggest taking a look at Marigot Bay in St. Lucia. We were last there in 2016 so it could be VERY different, but we stayed at the Marigot Bay resort docks for a pretty low daily cost, even with power (under $50 if I recall correctly). And with our dockage, we had access to the resort and pool. The resort is now a Hyatt so I don't know if the same offer is available but I would stay a few nights there in a second if it was. We were there in July 2016 and it was so quiet it was like we had the resort to ourselves.