Catch an event at Aloha Stadium during your trip to Halawa. Attend a sporting event or simply enjoy the top-notch restaurants while you're in the area.
You can take time to visit Aiea Loop Trail during your travels to Camp H M Smith. Make time to visit the area's temples, or simply enjoy its top-notch restaurants.
Though Pali Momi Medical Center might be what brings you to town, perhaps you'll have a chance to explore more of Waimalu while you are here.