I'm lucky enough to live in sunny San Jose, Kalifornia, so long-term storage here isn't an issue.
But if you are going to not ride it for the winter, makes sure the driveline is freshly cleaned and lubed. Contaminants from the road will quickly start to rust metal driveline components, as well as rubber brake pads. I'd even coat the exposed cables with a thin film of grease, to keep them protected.
As far as the tires are concerned, I'm not aware of rot being accelerated because it was stored at half pressure, full pressure, no pressure or by hanging it up. One safety tip, if the tires are more than two years old you are #1 not riding enough (joke there) and #2 running the risk of a blowout due to casing failure from UV rot. What's cheaper, 2 new tires or dental reconstruction?
Hope this helps
AL