I guess we were lucky in Dunedin; forecast a week out was rain, and by Saturday it was fine .. went to the Botanic Gardens as normal.
Nest spawns/weather spawns seemed to override Charmander spawns, but that seemed common around the world.
Did get a few 91/93% IVs on normal Charmanders, though I only found out after the event - evolved a stored 93% early in the event to get the exclusive moveset.
I did get another EX pass for next week - its at 1.30 which means I have to have a late lunch that will mess with the schedules just a tad, but I'll make it work.