Many here are posting good info and questions. Local LE, first responders and SAR teams are very capable and know the area well. They have searched the areas and swept campsites. I really hope that this kid is found.
It would be helpful if we knew the exact locations Samuel was confirmed to be at. The map that Hoosier952 made is a great idea. We need to solve this and FIND SAMUEL.
CAMP 10
A sleuther asked why only Camp 10 was checked. For whatever reason, that’s the actual name of that campsite. More on campsite numbers later.
CREATURES
Someone asked about venomous creatures. There are black widows, brown violin spiders, scorpions, centipedes. Was Samuel allergic to bee stings?
Kokee has wild boars. These feral pigs have tusks and carry Brucellosis; they can charge when threatened (Wild Pigs are a Growing Threat to Hikers on the Trail). Hunting (gun or bow) is allowed in certain areas, some of which intersect hiking trails or campsites. Hunters must undergo safety classes prior. There are always lost hunting dogs, but rabies is not a factor as this does not exist in Hawaii.
FORAGING
There are no fruit stands in the area as was suggested by a sleuther. There are plum trees, but they are not in season. Guavas are in season, but they are at a lower elevation than Kokee State Park.