Camping, mainland style (no sand!)
This was such a great place to camp! The camp grounds are large, varried, and have decent comfort stations. The campground we stayed at (Ku'ou) was situated on top of a hill overlooking a tranquil lake and the beautiful Ko'olau mountains. We were really surprised that with such great amenities that only one other person was camping in the area...what a shame, all the people camping at the beach are missing out big time.
Unlike the experience of the guy in the previous post, i found the ducks to actually be pleasant and adorable; and seriously, its not like the ducks are running you over, only 10 max came up to us, and this was after going up to them to feed them.
Its a bit buggy, but nothing a citronella candle couldn't handle...it all depends on where you set up camp, really.
All in all, its a great place to go and get away from Honolulu for a little while and reconnect with nature.