Now, the group is committed to doing that for Vicksburg National Military Park once again. The welcoming sign of Vicksburg National Military Park is seen on Wednesday, Oct. 1, 2025, in Vicksburg, Miss. (AP Photo/Sophie Bates)A closed gate barred visitors from exploring parts of the Vicksburg National Military Park on Wednesday, Oct. 1, 2025, in Vicksburg, Miss. (AP Photo/Sophie Bates)The Vicksburg National Military Park visitor center sits closed Wednesday, Oct. 1, 2025, in Vicksburg, Miss. Other groups aid visitors in park employees’ absenceAt Rocky Mountain National Park in Colorado this week, drivers were waived through without paying an entrance fee.