Image Politics and the Palin Clan's Drunken Brawl

Apparently the Palin clan was involved in a 20 person drunken brawl at an "Iron Dog/Snowmachine party," whatever that is.  The sources on this seem scattered and the account is difficult to piece together but Addicting Info seems happy to report it as fact and even headlines it with "Police:" which gives a bit of additional weight to the suggestion.