From the facebook event page 1/18/24:

Meet up in Chicago to ride to Milwaukee to board the noon ferry across the lake to Muskegon. Ferry ride will take 2.5 hrs and will cost $66 per scooter ($108 w sidecar) and $108.50 per person base rate ($130 premier). We can discuss if we want to spend the night in Grand Haven to see the musical water fountain show in the evening, or to continue riding back to Chicago same day. Actual dates /times tbd.

(Note, to view see SCSS facebook posts, you must be a member of the SCSS facebook group.  All are welcome, but they’ve been having spam problems and locked the group down.)