Bloomington Planning Director Tom Micuda says it's unlikely zoning would stop the spread of student housing downtown.
Low turnout due to stormy weather could mean fewer funds for restaurants and food banks that benefit from the event.
A proposal going before the Bloomington city council would virtually eliminate free parking from the downtown retail district.
The march from Dunn Meadow to the courthouse was part of a national movement known as Take Back The Night.
The city of Bloomington is looking to expand paid parking in much of downtown.