See my reply under "Unsure: Holland America???" post.
HAL has standard youth program hours. Usually they're 9 to noon; 2 to 5; and 7 to 10 p.m. with group babysitting afte 10 p.m.
And yes, they have the youth program while the ships are in port so you can explore without your kids ashore if you desire.
Overall, we enjoyed HAL.
Family Cruise Editor