The oil doesn't get on the clutch side of the flywheel, in my experience anyway.
I've got a rear main leak on my Camaro's SB350 (two-piece seal), and the oil runs straight down the back of the block from the crank.
But the oil then collects in the inspection cover (auto trans) and, when it puddles in bottom of the cover (whiich does NOT take much oil in my case) the flexplate ring gear catches it and the mist goes pretty much everywhere... more-so on the passenger's side (and onto the starter nose) but there doesn't seem to be any area in the "housing" formed by the engine / trans / cover that is immune.
The oil never runs out of the inspection cover drain hole because the ring gear spreads it around before the puddle can reach the hole. I suppose if I ran the engine long enough to accumulate a lot oil in the cover, it would drain out with the engine off, but I don't let it accumulate.