Why not leave the bike with the pistons at top dead centre this would help wet sumping. oil way in journals upper most.
I've considered that ^^, but as I'm lucky I don't have wetsump issues, never pursued it; having said that, I also considered that ALL the oil in the crank gallery would drain back to the T/S Main bush and further, so would need to be primed some before startup.
On the other hand, I also considered what would happen leaving it at BDC, or half way between but as I don't have an issue never bothered.
I reckon if it'll be parked up long enough to wetsump, best option is to start up periodically (not ideal unless going somewhere), or even better drain the oil tank into a container and re-add it before riding(maybe even through a filter).
I have to say, I'm getting fairly bored with this crap subject, even if some of the ideas are 'entertaining'