I park mine up for winter with just the occasional start and if possible run to keep things ok. I just leave it as is, if the tank is full so be it, if nearly empty so be it. Never a problem restarting due to stale petrol. The last "won't start" problem this spring was after a run and a bit of a clean inside the next time I tried to start it dead! Battery finally given up the ghost? Put on charge tried again, no problem. Culprit? The driver! He had accidentally knocked the dashboard light switch to "on" so the battery has slowly run down.
I would say that battery condition is more likely to cause problems after a lay up, ignoring driver error of course.
Oh, I agree DRIVE IT MORE !!
Oops! Now I've opened another old debate topic . . . π±