Half a mile hike?  On no not a 15 minute walk.  I've walked further walking from the far end of the pepsi center parking lot to the door.  Events like this are something that many people want in Denver.  Outdoor music events like Jazz in the Park and other outdoor festivals are some of the most fun ways to spend a summer day.  The location is a little odd but at least someone is thinking outside the box to find new and exciting ways to utilize Denver's parks.

If this is a well run festival they'll be responsible for security, ambulance/ medical service and certainly cleaning up the park.

If you aren't interested in going to the festival than by all means stay home.  Non need to dictate what everyone else can and can't do.