Figure out how much time and money this campaign will take and determine if you need outside help. You'll have help from outside activists if you want it. Reach out to other clubs and groups in your community that can help you achieve your goals. Attend meetings that involve other environmental issues - talk with activists, politicians, and community leaders. Get recognized and really communicate with people who can help you even if that help is minor.
People always have connections.
Don't be shy about sharing your campaign with others. This isn't a secret and the more people who know the better your chances are to connect with someone who can help. In some cases it will take knowing just one person to win your objective - for instance, the person in charge of purchasing paper. It is important to build coalitions whenever the opportunity presents itself, especially during the research process. For most colleges and universities, getting your school to change to TF or PCW paper will not be a quick campaign.