before i had a shop, i just tarped them off and left em as is. no oil change, no jack stands, no nuthin'. now that my kafers spend all their time in my heated shop, they just get denied a tarp. i figured the first 40 years haven't hurt them, why would the next 40?
since i've been driving, once the insurance ran out, i park 'em. usually i give them a tarp, sometimes i don't. then after x-mas i run them up for 20 minutes, then back to bed, and in spring, when i insure them, oil change and grease job and back on the road. hasn't let me down yet! my 2 cents...