Park rangers recommend setting aside a half day to explore Herbert Hoover National Historic Site.
If you only have a couple of hours, get oriented at the Visitor Center, take a self-guided walk of the grounds and historic buildings, visit the Presidential Library and Museum and perhaps stop at the Gravesite or the tallgrass prairie observation deck on your way out.
With one hour or less you can still see the 12-minute film and plan your visit at the Visitor Center. Walk to the Birthplace Cottage, the Blacksmith Shop, the Schoolhouse, and the Friends Meetinghouse. Then come back again when you have more time to visit. Herbert Hoover National Historic Site is much more than a quick stop off Interstate 80!