Call on them to be responsible, professional, balanced and inclusive of diverse sources and viewpoints. There are many magazines, small community papers, campus papers, newsletters and websites that would be happy to cover your group's activities. Remember also that you can tell your own stories and distribute them later. Letters to the Editor are typically 150-200 words. Effective letters can even run as short as 50-100 words.
Long letters have little chance of being published.
State the point clearly, ideally in the first sentence. Refer to the date of the issue of the article or editorial you are responding to. Respond as quickly as possible. Try to get your letter off on the day, or the day after, the article you wish to comment on was published. Most newspapers will only print a letter to the editor after calling the author to verify her or his identity and address.