Wish I had seen this while you were out, but for anyone else... I would also recommend the macadamia farm right there by Kualoa, Tropical Farms. If you wanted to go north, the Kahuku food trucks aren't very far, including Giovanni's shrimp. And if you wanted a beach nearby there is Kualoa Beach Park right across the road where you should take a look at Mokolii (Chinaman's Hat, a little island. And don't be afraid to follow the road back there to see if you can find an often very quiet beach) OR if you go a little farther south you could check out the beach in Kailua which is probably my favorite

Hope you are enjoying your time here!