The best places we could find to camp are at the A-frame cabins at Hapuna State Park , and the tent campground at Spencer Beach County Park . Contacts are listed below. Spencer Beach is a few miles further north than that, by a small public beach. There is a campground high on the shoulder of Mauna Kea, but it is over an hour from Kona, and the nearest camping to the south is over an hour away. In other words, your choices are limited.
Pavilions often have electric lights.
Drinking water is available, but at times brackish water is used for flushing and showers, so read all signs regarding water. Cooking fires are allowed in established firepits, but no wood is provided. Charcoal is a good idea. If camping in the mountains be prepared for cold and rainy weather. You can find plenty of stores that sell, and a few stores that rent camping equipment.