If you're only playing one round, please play it on Maui and not on Oahu.

If you're only in Hawaii for 5 days and are on your honeymoon, I would suggest you spend all of your time on Maui, actually. I guess it depends on what you want to be doing while you're on your honeymoon. If you want to just relax and spend a lot of your time together, there really isn't much of that on Oahu.

Since I don't live on Maui, I suggest you should go with hackerboy or lwc's recommendations. I've heard good things about both the Plantation and Wailea courses.