We will be arriving in St. Croix on Sept 21 and our husbands are diving. We just want to just go to a nice beach in St. Croix. We have been to several islands around there but never St. Croix. We would rather not have to take an expensive excursion, but didn't know if, how, or how much getting to a nice beach would be. What would you recommend we two middle-age school teachers do?