All Ocean Village trips are rather expensive and some take you to retail outlets that you would not visit by choice. All of your ports will have plenty of cabbies waiting and willing to offer you a bespoke day trip at a negotiable price that gets cheaper if you can team up with another couple. The only downside is that the ship won't wait if you are late back - but it does for its own trips. Having said that the chances of a problem arising are virtually nil - you are more likely to be struck by lightning. Why now try a mix of both - you can book onboard trips right up to the last minute in most cases, in spite of what they might say.
What and where is "Mexico park".