Bus sighting Milwaukee WI.

[CrabbyMilton]

I was at the MITCHELL AIRPORT observation lot (Layton Ave.) yester in the 4:00 hour when a PREVOST(MARATHON) pulled in and parked. Looked to be of late 90's to eary '00's vintage but it may have been newer than that. The driver got out and looked around at the thing and went back in. If was mostly tan with some stripes with a WI. plate.
I left about 15 minutes after that. Anyone on here with that bus?