Private Tour- 13 people - larger transportation than a Van?

[kimflkim]

Hi, 

Heading to St. Maarten in December while on Symphony of the Seas.   Looking to book a private tour for 13 people. (ages 12-80) 

So far all the tours look like they travel in a van- which could get pretty crowded with 13 of us... 

We went on a tour in the Dominican and the operator had a larger bus  that could fit 20 people - so we were comfortable.  

Wondering if anyone has suggestions? 

[Ashland]

Check out Bernards Tours...He's one of the most popular private tour operator's.