Tipping?

Just trying to get an idea on how much money to bring for tipping. We'll be doing private excursions in Cozumel, Jamaica, and Grand Cayman. What's the standard amount for a half day or full day tour guide? What about the guides at a site we stop at? Many thanks!

In general, we tip 10-15-20% of the excursion fare, depending upon the quality of the service.

In general, we tip 10-15-20% of the excursion fare, depending upon the quality of the service.

Ditto.... usually 15-20%, but that can be divided among bus drivers, guides, etc. More if they went above and beyond.