Outdoors piano care

[Carman Gentile]

My colleagues,

  A local hotel wants to move their 1985 Yamaha G1 grand to an outdoor 
stage for a two-week jazz festival in June. They asked me what precautions 
they should take.
   I advised them thus:
1. Keep the piano out of direct sunlight at all times.
2. Keep the Dampp-Chaser humidity control system plugged in at all times.
3. At night cover the piano with thick blankets.

  It will be for the last two weeks of June where the temperatures here are 
mild:
  AVERAGE MAX TEMPERATURE......  62.7
  AVERAGE MIN TEMPERATURE......  52.1
  AVERAGE TEMPERATURE..........  57.4
If (unlikely) rain were predicted, they would move it back indoors.

   Do you folks have any additional advice?

Carman Gentile
Redwood Chapter
Humboldt County, Northern California