Recommend renting a car from Detroit airport as there are not any rideshares like Uber or Lyft in the area.
This will be a kid free ceremony
Cocktail attire.
There is parking and valet at ceremony, if there is snow, roads & driveways will be cleared.
Weather permitting, the ceremony may be outside. Wear your finest parka & hats & gloves if you'd like (Florida people I'm talking to you)