Regarding your Rum Point Beach area plan:
"Kaibo" consists of condos, a building with two restaurants, a coffee counter, and a dock. If you aren't eating there, it isn't much of an attraction. Kaibo Crescent is a street with condos and a couple of homes, not sure what there is to see.
You mention Bio Bay, but also say you will be having dinner back at Sunset Cove - just to be clear, the bioluminescence at that time of year won't be visible until around 9 pm and also varies dependent on the moon phase for the days you are there.
To get to Rum Point/Kaibo area, you will cut across the island on Frank Sound Road, and the QE Botanical Garden is accessed from here. You might want to switch that activity to your Rum Point day. I suggest taking the behind the scenes blue iguana tour if you are interested in seeing them. Small groups, lots of iguanas, and a little educational info on a rare species.
You might want to spend more time just hanging out at Rum Point Beach, rent paddle boards or jet skis, eat and drink at The Wreck.