Secret Sands Excursion - Oasis ?

[RCLFan]

We will be sailing Oasis on Oct 1st, and stopping in St. Thomas; my wife wants to shop 1st, and I'd like to also include some Beach time.

 

If we book the "Secret Sands" Excursion, departing at 10:45 a.m, what time can we expect to be back in Charlotte Amalie to allow time for Shopping?

 

Our itinerary indicates we are in St. Thomas from 10 - 7.

 

Or, are we better off Shopping 1st, and securing a Taxi to Smith Bay Park on our own and just returning to the Ship via Taxi? Can we secure a Taxi for our Return?

 

I know a lot of questions, I just hope someone has either done this excursion or has had similar experience.

 

Thanks in Advance for the help! :)