Great trip report and glad your family caught the "bug" the rest of us have. Couple of thoughts:
We loved Scrub but have considered it a "crew" decision. We generally have some combination of adults and some like a resort stop and others not as much.
FCFS was definitely a possibility at Cooper, you just never know. As long as there is a Plan B it's worth a shot
We try to go 10 days each trip and hit 5 of the hot spots for repeat visits and 5 new spots of interest. Means no trip is ever the same and we LOVE that!

Congrats on a great trip!