I've been adding events to the ns calendar and I have a couple suggestions. They may not be completely applicable to everyone b/c I'm (trying to ) adding a lot of events and I don't know how many people actually use the events listing.
1. Change the drop-downs for the date of the event to a small calendar so you can just click the date.
2. Add a website link for the event. A lot of resorts are pushing their own park pages and it's helpful to be able to check out if any changes have been made.
3. Add an add event to calendar button for people who want to go to the event. It needs/should be a .ics file so you can add it to apple ical, google calendar, outlook, etc.
Take a look at Facebook's event creation page. It's got this info and I've found it really helpful.