I can't really speak for MN, but I OC'd at my local zoo with no problem in WA.
Washington = 50 year old carry law, quarter of a million permit holders, good firearms culture
Minnesota = 6 year old carry law, 86,000 permit holders, majority of metro ignorant about gun laws and will probably call police.
I'm NOT saying don't do it... but I would fully expect the Metro soccer moms to call 911, and you will be visited by DCSO, or Apple Valley Police.