I was just there in April, but on the Miracle. We were tendered right into Belize city. I have been to this port a few times and found the excursions to be really great. This last time we did the Xunantunich Mayan Ruins and loved the whole tour. Bus ride is 2 hours but was a wealth of information and of all the ruins we have been to this was the best. We stopped on the way back and had a terrific lunch.
The cave tubing and canopy tour are both supposed to be really fun if you like a more active excursion. We knew of people that went on both and were very pleased with their choices.