Sorry, no O-47 at the MN ANG museum. According to the latest newsletter, the MN ANG Museum has been notified that they may again be forced out of the alert hangar this spring. If this happens, the museum will again be closed to the public as happened after Sept 11, 2001.
There is quite a lot at Anoka but other than American Wings, most of it is with private owners. American Wings has Mohawks(7 according to the Mohawk Association), an L-19, L-39, S2F, and various aircraft on loan, I think there is still an N3N there.
There is also the CAF Lake Superior Squadron at Duluth International Airport, depending on your route, you may very well drive right past the airport. There are also a few aircraft on sticks in the area, but they are mostly at least a few miles out of your way.
Here are a few sites you may find usefull,
CAF Minnesota Wing
American Wings Air Museum
MN ANG Museum
CAF Lake Superior Squadron