This message is a bit late but good for another time. Ring the Dockers 2 weeks before and they will put you down for their allotment in a Dockers area. They email a form to you and you just fill and return and pay.
We had great seats to the Freo - Dees game at MCG earlier this year.
I say you could still ring them and ask the question
I took a day trip to melbourne for the bulldogs game, asked if i could sit as close to the cheer squad as possible.. So I got Row 1 right on the fence.. I feature on the clancee pearce highlight reel going nuts :)
Anyways, you should be able to rock up, ask for a ticket as close to the freo cheer squad as possible and have a great time with the vic supporters.
And I hope to go as well, will be over there that weekend, fingers crossed I can convince the missus to come along.