There are several good lists for Star Parties and other astronomical events. Some are kept up-to-date more than others. Check these out:
- ASN Star Parties & Localized Events Calendar
- Annual Star Parties in North America (from Sky & Telescope)
- The Astronomy Events Calendar (from AmSky)
- Star Parties & Astronomy Festivals (from Go Astronomy)
- Places to Go, Stars to See
(from StarDate)