Here is some news that is very similar and seems to have the same aim. Perhaps PETA will join USP and file a "friend of the court" brief in support of USP?

Anti's Seek Court Order to Stop Bowhunt
USSA offers legal expertise to county

September 7, 2007 (Pennsylvania)



A lawsuit has been brought in Pennsylvania that could allow animal activists to prohibit hunting on properties that are left to the government as charitable trusts.

Three anti-hunters recently filed suit seeking to overturn a decision to permit archery hunting on a portion of the Trexler Game Preserve in Lehigh County. The county entered into a cooperative agreement with the state that will allow archery deer and turkey hunting, beginning on Sept. 29, on 471 acres of the 1,100-acre preserve.

Plaintiffs Virginia Wolfe, president of the Lehigh Valley Animal Rights Coalition; Shawn Hubler; and Carol Loomis claim hunting runs contrary to the intent of the late Gen. Harry Trexler, who deeded to property to the county in 1933. The women are not affiliated with the Harry C. Trexler Trust, but have nonetheless asked a judge to stop the hunt until a hearing is held on whether the plan violates his will.

Jane Roth, executive director of the Harry C. Trexler Trust, said the trust does not take issue with the plan.

County officials will be asking a judge to rule that the women have no right to bring suit. None of them have any connection to the Trexler trust, nor can they prove their claim that the late General Trexler, who died more than 70 years ago, would not have approved of the hunt.

The U.S. Sportsmen’s Alliance Foundation will offer legal experts to Lehigh County on this issue.