Valley Forge was not closed 'by a federal shutdown'. It was closed because an individual, acting at Obama's behest, gave written orders to park rangers to effect the closure. That individual is the toady Director of the National Park Service,
Jonathan Jarvis.
Jarvis closed Valley Forge. Jarvis fenced out the WWII vets. Jarvis threw people out of their homes within park lands. Jarvis tried to take possession of Mt. Vernon. Jarvis blocked access to Mt. Rushmore. Jarvis is the craven, snivelling scum that licks Obama's shoes and says "thank you, Master".