I've read that PA has ordered all campgrounds to close, private as well as state.
TT has supposedly sent out a notice to anyone with a reservation in a PA park that they have been ordered to close their CG in the state.
But I can find nothing on the TT site about this.
PA government website has a long list of industries and type of facilities - what can be open and what must be closed.
Under the Leisure and Hospitality category is RV Parks and they are allowed to be open for "Residential Only" use.