anybody near Hackensack,MN?

I am looking for a resort that used to be owned by Fred and Macie Zwiefel in the late 50's to sometime in the 60's. We used to stay there almost ever summer when we were kids. Wife asked where to spend vacation this year and I thought this would be a nice place but can't find any info. Have a call into the Chamber of Commerce to dig around. Anybody know or any ideas where to check? Thanks! Bob
Don't know anyone there personally, but a couple thoughts come to mind...

You may be able to find something by calling Cass County, as Real Estate records are Public Information. Maybe you'll get someone on a slow day....

Second thought: The Minnesota Historical Society may be able to help. My wife has used them in the past for some things, and they were really helpful, I guess.

Minnesota Historical Society homepage | Minnesota Historical Society

Good luck!

Jim