I have many books written by Carl Sandburg and signed by him because my sister in law worked with Mr Sandburg and was a friend of his. Would you like to have these books for your museum?

You should definitely call the park headquarters the superintendent and/or the head of the museum arm would be very intrigued.

https://www.nps.gov/carl/index.htm

No question you should approach them

I do not work for them but I'm sure they would be interested in them.