Save Te Horo Hall fundraiser

I am running a scavenger/treasure hunt, car rally event on 26th May to raise funds for the refurbishments needed to make the Te Horo Community Hall earthquake resilient.
Directions are given to follow a route and clues to identify markers along the way. There will also be a list of items to collect along the route.
This is intended as a family activity, although not exclusive; a group of friends would have equally as much fun. The cost is $40 per car; all funds go to the cause.
It would be really helpful to get an idea of numbers interested in this event. Please let me know, no commitment required, if this is of interest to you.