On June 15, the legal counsel for the Pennsylvania state agency that controls state parks agreed that small groups of petition circulators may work in state parks without first asking for permission. See this ACLU press release, which has links to the correspondence between the ACLU and the state agency. Those who are interested in having the legal citations that the ACLU cited may wish to print out copies of the correspondence. None of the four letters (two from each side) are more than a page or so.
The Green Party contacted the ACLU after its petitioners were stopped while in Point State Park, located in Pittsburgh.
Great news for our neighboring state! The Constitution Party of West Virginia won a similar lawsuit a year ago, and I wonder if was looked at as precedence for this Pennsylvania decision: http://www.rutherford.org/articles_db/press_release.asp?article_id=773