First goal: Finding a place for people to gather and collaborate online.
The Facebook page is a good start, but it’s a little stark. Content needs to be added onto the site that will give folks who are interested in the cause reason to go and learn more. Updates on events, memes, posters, protestors, location of the tank or any other quantitative or qualitative data would be helpful. This will create a place that you can send people who are interested in your cause and give them the tools they need to help you out. Ask everyone you talk to go to your Facebook, and show the link on posters and signs at all of the events you find yourselves at.
Second goal: Spreading the word.
Twitter would work excellently here. All events that are set up should be tweeted before, with lots of info and updates before the event itself. Tweeting during and after the event would help include people as well. Having this reliable network will allow you to send out the messages you want to share and have it travel to people you don’t know. If the updates are often and helpful enough, you should begin to see those in your community retweet your messages and your messages will begin to reach more and more people.
Third Goal: Where to spread the news?
Even though the tank would be located in Searsport, many towns in Maine would be affected. Finding local groups that would help support cause would take some of the work off of your group by convincing them that it is worth their time and effort to raise awareness for your cause. With the data you have available, it shouldn’t be a problem to convince them. Showcase your website, facebook page, and twitter. Keeping the momentum within those cycles will help content maintain it’s freshness.