I hunt the southern portion of Williams Creek.
Most of unit is free walk in ( no camping) access behind gates.
I camp on state land near Naselle.
Bay Center has a KOA, Bruceport has campground, access to Dnr gates,
I plan on investigating the Trap Creek acess this year if I have time, just out of curiosity, have not been in that part of unit.
I heard about some other access permitted areas, but cannot remember who the company is...
But if you got a bike, or like really long walks, there is lots of access, just limited options for camping near the gates.