In New Zealand weekend-long larps are now exclusively live-combat campaigns, part of an ongoing series. But that's not the only possible format. The New England larp culture started with weekend-long theatre-style games, originally parasitic on SF cons, later standalone in hotels. And in Scandawegia and the UK there are strong traditions of one-off weekend-long games. There's a lot of documentation on the Nordic side of this (Monitor Celestra, Castle of Wizardry, La Bete), but here's some other recent examples:
God Rest Ye Merry - a ghost story set in an old mansion (this has great details on their SFX, BTW)
Celtic Fire - occultism in a sleepy Welsh town during WWI
Camp hatchet - 80's teen slasher movie
Operation R'lyeh - Cthulhu at the end of WWII
Has anyone thought of producing such a game in NZ?
(Also, dump future examples in this thread - they may inspire others)