Will Fed shutdown bar access to Nat Forests? Nat Parks?

During the government shutdowns in 2018 and 2019, the parks remained open but with reduced staffing or curtailed services. Probably best to check the website for your destination park frequently prior to October 1st.

Whether the "tribes" in DC come to an agreement on a budget or cobble together a continuing resolution for a couple weeks or a month until a budget agreement is reached? Anybody's guess......