You might try booking a tour directly with Acadia National Park on their website instead.
We've done this and it was great and they gave us a discount coupon on lunch at Testa's restaurant in town that we used after the tour.
Our DS and DIL are sailing with us so that's not needed. We just thought it would be easier to take the grandkids with us through TSA. We're all on the same flight.
I'm very aware of the permission form needed and I provide that link often here on CC for those that might need it...but thanks.
You'll need something like this notarized for each child.
https://www.royalcaribbean.com/content/dam/royal/resources/pdf/minor-traveling-without-parent-or-guardian-form.pdf
My post was a warning to those that may not know what the approximate cost for a taxi from FLL-PE should be and why most of us on CC are aware of some being over charged when quoted a flat rate.
You're lucky your flat rate charge was within the metered rate but that isn't and hasn't always been the case at FLL.
Try South Florida Shuttles, Larry's Limo's, SAS Transportation or Jiffy Jeff.
Easy to find these at FLL as they will all give you details when pre-booking with them online.