PLers are just players, and they have to play by the same rules as everyone else. If they are monopolizing content by holding down multiple camps ask them nicely to stick to one and then /petition a GM if they don't. If they're just using a camp spot, what does it matter if they are a PLer or a lower-level character? Your issue is just with the server population, not with PLers.
If you're just having trouble finding somewhere less popular to hunt might I recommend the
Per-Level Hunting Guide?