Ber Rabbit:...I don't particularly care for Portage because I've never seen good visibility there but I do like diving the silo...
http://bp3.blogger.com/_roe2_mOIUEU/RqOo33iXJzI/AAAAAAAAAKU/eEovRSYQUA4/s1600/port4.jpg
Generally, I agree with your statement about Portage. I will say, however, last Sunday, we had AWESOME viz (talking Caribbean 60-70' viz).....above is a link to just one photo( i'm on the left)
Photo by our dive buddy Marshall