It appears that my message of last evening did not get posted.
Rev. Charles Schenck is buried in the graveyard by 1st Lutheran Church in Middleton. He is listed as Carl which is commonly used for Charles in the German language.
You can see the monument for him on findagrave. com. It states that he was the pastor from 1859 to 1883 when he died. There are a couple of other family members buried there also. My daughter was married in that church in 2000. The building is now on the National Register of historical places. Now to locate the records. It was not uncommon at that period of time for a pastor to go from one nearby parish to another, rotating during the month, etc.
Also, regarding the Charles Schenck buried in Walnut Hill Cemetery in Baraboo might be a son of this pastor.