MJE, here's a few pubs & micros to be getting on with.
I'd probably rate Bells as a must-try over Gunns - the two are only a couple of km or so apart.
If you are going to be out & about maybe ring some of the regionals & see about tours etc.
Bells Hotel and Brewery - Brewpub
157 Moray St, South Melbourne, VIC 3205
Ph 03 9690 4511
Bintara Brewery Micro Brewery
17 Drummond St, Rutherglen, VIC 3685
Ph 02 6032 7517
Boyntons Brewing Company - Microbrewery
6619 Great Alpine Road, Porepunkah, VIC 3740
Ph 03 5756 2610
Buckleys Brewery Micro Brewery
Yarra Flats Brewery
Factory 1, 4 Ardill St, Healesville, VIC 3777
Ph 03 5962 2701
Buffalo Brewery - Brewpub
Rmb1570 Boorhaman Rd, Boorhaman, VIC 3678
Ph 03 5726 9215
Carlton and United Breweries National Brewery
77 Southbank Boulevard, Southbank, Melbourne, VIC 3053
Ph 03 9342 5511
Geelong Brewing Micro Brewery
80 Point Henry Road, Moolap, VIC 3221
Ph 03 5428 5710
Grand Ridge Brewing Co. Micro Brewery
Main Rd, Mirboo North, VIC 3871
Ph 03 9778 6996
Gunn Island Brewery - Brewpub
102 Canterbury Road, Middle Park, VIC 3206
Ph 03 9690 1958
Holgate Brewhouse Brewpub - Microbrewery
Keatings Hotel, 79 High Street, Woodend, VIC 3442
Ph 03 5427 3502 - Microbrewery
Ph 03 5427 2510 - Brewpub
Jamieson Brewery & Lakeside Hotel - Brewpub
Eildon Rd, Jamieson, VIC 3723
Ph 03 5777 0515
Mountain Goat Beer Micro Brewery
56 Crown St, Richmond, VIC 3121
Ph 03 9428 1180
Portland Hotel - James Squire Brewhouse - Brewpub
115 Russell St, Melbourne, VIC 3000
Ph 03 9654 5000
Rifle Brigade Pub and Brewery - Brewpub
137 View St Bendigo, VIC 3550
Ph 03 5443 4092
Scottish Chiefs Tavern Brewery - Brewpub
Fitzroy Brewing & Steampacket Brewing Co
99 Corio St, Geelong, VIC 3220
Ph 03 5223 1736
Stockade Brewery Micro Brewery
132-142 Bangholme Road, Dandenong South, VIC 3175
Ph 03 9706 6589
3 Degrees Brewpub
Number One QV Square, Crn Swanston & Lonsdale St, Melbourne, VIC 3000
Ph 03 9639 6766
The 3 Ravens Brewing Co Micro Brewery
1 Theobald Street, Thornbury, VIC 3071
Ph 03 9495 1666