This is my favorite non beach/permit required place to camp on oahu. There are two areas up at peacock flats that you can check for camping permits. There is one porta potty like bathroom structure located at each area. There’s no water source. All camp areas come with their own covered picnic table. Well maintained area.
This campsite requires permit and 4wd car to access it. It’s about 7miles in. You have to go thru military gate so You cannot enter after 6pm daily and cannot enter before some time I forgot. I had a Subaru crosstrek and did awesome. The road can be muddy if it rains and have sharp turns followed by steep inclines so be prepared. The camp site does have a DLNR road that access it from the north side of the island and you can hike up the road, it’s about 3mi and access the camp site as well if you do not have a 4wd vehicle.
I’ve camped in site 5 and 4. I like site 4 because it’s down and away from the other sites so it’s more private and it’s well shaded in the morning while some of the others have beaming sun! A down side of site 4 is there’s a slight decline so when you are in your tent, depending on where u set up, can be a little slope down.
You can also keep driving up and access the trail head to Mokuleia Trail. A well maintained trail, partly shaded where you can walk up to the rim and look out over the valley. Easy basic about 1 mi in.