I have camped in the Na Pali valley. Unfortunately the DLNR is not controlling feral cats there. The cats prey on NeNe, especially the chicks.  These people are not homeless. In talking to some of the squaters not one was from Hawaii. They have sufficient resources to own kayaks and pizza ovens. And purchase plane tickets from the mainland to kauai. Keeping NaPali a wilderness area is very much part of He DLNR mandate. Why have a permitting system that limits human impact to a wilderness and not enforce it? 
The arested will have names and ia public record. Check it out.