Grandfather’s duties

A few weeks ago I was asked if my granddaughter Elizabeth could hold her birthday party at the farm. I replied “yes, of course” and promptly forgot about it. I’m now informed it involves 20 sixteen year olds (both genders) camping down on the flat near the creek.
Casting my mind back to similar situations about 20 years ago, I quickly limited my responsibilities to preparation of the venue. I mowed the paddock today for the tents and campfire, tomorrow I’ll carry some logs down with the tractor for seating and leave all other responsibilities to the generation between us and the aforementioned 16yos!