[arucano]

The only reason for inflating the tires is IF you DO NOT use jack stands during long storage. The high pressure keeps the tires closer to round (less flat spot) during the extended standstill if the car is NOT on jack stands. There is no special inflation required if stored on jackstands, since there is no load on the tires and they thus remain "round" during the storage period.
The flat spotting will manifest itself as a thumping noise and a sence of being out of balance when you take the car out of storage