Local Parks Overrun By Outside Vermin

I've been following a Facebook page for Easton, Pa. for a while now apparently created by Laini Abraham . It seems so has the Express-Times as now they've reported on the Overcrowding at Penn Pump Park

It seems far too many from outside this area have been invading and overwhelming our local parks. This past weekend someone paid $100 for a permit to host a graduation party. Basically they were forced to endure the sharing of drinking, parking problems and the merry making by those who applied for no such permits.

What are your thoughts?
Should people from Jersey be allowed to take advantage for free our local taxpayers' supported parks?
Should locals have to pay for the clean up and to police after them?
Can we legally exclude them somehow or should we even do that?
Should parks be open to everybody even those who live miles away from another state?I think you already know how I feel about this by the very nature of the questions I've asked. It's my opinion they should keep their shit in their own backyard. They're not welcome here.

See also this in the Express-Times
Poll: What can be done about crowding, abuse of public parks?