You stop in anytime and visit the gift shop. If you want to do the official 30 minute tour, they have a daily tour schedule. It's recommended that you get there early to get a time slot. They open at 10am and the line to get on the schedule can start at 9:30 (maybe less busy in the off season). The tour and tastings are free.

The tasting is about 45 minutes. The sampling of rums is different each day. The information provided during the tasting is very interesting, and entertaining. Really enjoyed the tasting - I recommend the tasting, just NOT the gift shop $23 dark chocolate rum bar!

There is a train ride that they could do that takes you around their property. I believe there is also a sweets/ice cream shoppe on the property as well. The gift store is just next door that they can hang out in.

Sign up in the gift store. They run about every 30 minutes so the wait is never too long. As tempting as it will be to purchase rum there, the local grocery store will have the same selection for less.

I tend to pack and send home.

Take an uber and you should have plenty of time. It's not very far from the port, 20 minutes max, and its in a pretty well populated area so you shouldn't have a problem getting there and back. Just be sure to check the schedule for that day because there are some days that have a different schedule.

The Rum Tasting is FREE, tips are appreciated

The tour is everyday on the hour or 1/2 hour. You can sign up in advance for the time you want

It's a little far, I'd recommend you take a taxi or perhaps they have a shuttle?