I think that is a good idea. You are right, there are so many other things to do in JA, your head will spin and you'll force yourself to slow down. My advice is not to plan too many things beforehand. I did that my first trip and by the end of every day, the kids and I were exhausted and feeling like we didn't get to relax at all. Take each day as it comes. Your hotel can help you plan some day trips or whatever when you are ready.

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Life's just a crazy ride on a run away train
You can't go back for what you've missed
So make it count, hold on tight find a way to make it right
You only get one trip
So make it good, make it last 'cause it all flies by so fast
You only get one trip