I obviously don't live in Minneapolis, but I'm curious about your lodging and charging situation while you're there. Are you going to be staying with family, where you were planning to charge at their house?
I'm just wondering why the need for using a UMC, which is only used for charging from outlets? There are a TON of J1772 and CHAdeMO, and even a Supercharger in Minneapolis, none of which need a UMC. If you're visiting family, couldn't you drop the car off at a nearby J1772, while they drive you back to their house?
But yes, there are a lot of Tesla owners there too. I just don't know if you would happen to catch one of them on the forum, so I was offering some other suggestions.