South America - Cartagena: Rosario & Baru Islands day trip

Does anybody know a reliable guide/boat to take an economic private full day trip to these islands? I'm not a fan of those classical tours. Thanks

Any suggestions for Cartagena will be welcome (best tours, beaches, where to do snorkel, etc.)

Did you get the email that my business partner sent you?

Did you get the email that my business partner sent you?

Oh yes Thank you! I'm just collecting the most info, I always like to see the big picture before deciding