Going anywhere from here (even Oahu), is somewhat exhausting and quite time consuming, between the airports and security, and waiting and flying, car rental p/u and d/o, etc. That is especially true from Friday through Monday, which are the busiest airport days.

Then there is so much to do here and so much varied beauty. I'd suggest just doing something different here. Unless you're spending a month or more, I really don't think you can get bored. Plan a trip to a different island again soon. Just my thoughts.