I’ve had two motors sit for 12-13 years. I did nothing to prepare the for the years to follow. They sat with zero attention the entire time. Primed the engine and turned the key. Ran just fine.
Yep, all depends on climate, temp change ranges, humdittity, etc.
I release the rockers/shafts on our cars, non-ohcam.
Rotate the ohcam engines regularly.