It’s a personal gesture based upon the attitude of the attendant and the attention and service he provides. We are generally more generous both arriving and departing in SXM because I find their service to be exceptional. The exact dollar amount usually depends on whether we remembered to get adequate cash or not but never less than $25.00. I don’t know if that’s enough or not since I’ve never seen or heard of a tipping guide but they’ve always graciously accepted our offering and have enthusiastically thanked us for it. 🙂🙂