I have been to both Minnesota and Cincinnati stadiums. Minnesota can easily handle the draft logistically. Cincinnati is another story. The stadium is squeezed into a small space (river, highways and businesses). Not much room to handle an influx of 200,000 people. And their chili is an abomination.
For the Super Bowl in Indy, they counted hotel rooms in Terre Haute, Muncie and other far-flung cities. The stadium is isolated which is the main issue besides the weather. Buffalo and Green Bay will never host a Super Bowl because of the weather.