If you're going out to 2MT, make sure they're open before you go.

Also, they were about 5k past where my satnav said they would be.
I took a drive past Van Diemen Brewing and spoke to the brewer's dad who happened to be at the mail box. They're not (when I was there) open to the public.
When I was at MONA the Brewery was closed but we went for the wine tasting. $10 a head I think and if you buy a couple of bottles of wine you get it free. We were able to try all the Moo Brew beers including most of the seasonals as well. Good value and a great venue.
Ironhouse was a bit meh. Beers were ok but when we went in I asked at the bar if they did a tasting paddle. The barmaid said no problem. Went and got a table and when I came back it was the manager behind the bar. I asked for a tasting paddle and the reply was "we can give you a taste" then proceeded to pour a taster of 1 beer. I said no, I wanted a few to take back to the table so we could sample them there. I got a blank look and he obviously didn't understand the concept. They had all the little taster glasses but only give u one at a time at the bar.
Bought a couple of pots, decided I could brew better, went home.
Campbell