According to Find-A-Grave...

"This small family plot is actually located in Middle Smithfield Township, Monroe County. It is located at the northern end of gravel surfaced Township Road T515, which passes the former Camp Ministerium and Camp Miller."

http://www.findagrave.com/cgi-bin/fg.cgi?page=cr&CRid=23...;

Also, I found a John Grube in an area newspaper of 1847 from Middle Smithfield...

http://www.chroniclingamerica.com/search/pages/results/?stat...

Hope this helps!
Valerie