Michele, I'm SO TERRIBLY SORRY for the answer given by the other person.. I'm sure if your looked for the name Rose on any database system you would find persons.As often suggested, try switchboard.com.... No, I'm not suggesting that at all.
What you need is SPECIFIC names to research.Genealogy is sometimes easy, sometimes hard.It is like a criminal investigation.You must look for every clue and eliminate those not suspects.Imagine if an investigator called everyone named Rose into the Police station for an interview.
So, with that said.You need to start with KNOWN facts about the Hilgert and Rose families.WHO do you know that moved there, what was their date of birth, who was their parents, siblings, spouse, when they move there, and what do you know about each person.If John Doe Hilgert, born January 1, 1880, was married to Jane Rose, born February 1, 1885, both moved to Cottage Grove and would be there in the 1900 census, they could be found.Researchers need enough information on a person/persons to track them.
Identify who you seek and their information and believe me WONDERS might be found.