Hi Bob,
We did a stop there while on Ocean Princess and yes there were tour busses there for excersions. Here is the list of shore excersions we were offered earlier this year:
Historic Margarita & Porlamar
Tacuantar Villaage & Tropical Gardens
Eco-Cruise to La Restinga Lagoon
Manacao Beach four-wheel-drive Safari
Margarita Sea Fiesta
Also remember that you have to tender there, so allow for the time in that. We ended up just hanging out at the beach area there right at the pier, was really nice, very shallow water. Enjoy your cruise on Dawn Princess
Donnassei/Sealover