Leeuwin was fine when we visited a couple of years ago, though I think they make a nominal charge for their icon wines. That happens increasingly elsewhere, but in my experience, if you obviously are interested in their wines and don’t sound as if you are there to neck as much alcohol as possible, that frequently gets waived.
We couldn’t get into Moss Wood though - it was either members of their cellar club, or long pre-booked appointments only. Cullen was great! - and followed by an excellent meal in their restaurant.
Oh yes, Pierro - well worth a visit. Though their chardonnays are rather too heavy for my taste.