Now a days new tires will not flat spot that quickly, I have been storing cars for 10+ years and never had an issue. Years ago when I started I had the same worries but was enlighten by someone more knowledgeable and experienced that all would be fine for the 5-6 months of storage without lifting the car. Maybe if you were storing it for years then yes lift it or moving periodically. But honestly, even when I used storage facilities, like the barns or warehouse units before my current house with a garage, I never had any issue with my Z32 or Z34 and I would leave them there without going back or having them moved or touched.
you'll be fine just wash it, disconnect the battery and cover it up
