What can be done about the misdemeanor for being in park after hours?

My friend and I went to a park last night at around 1 am and there was a cop who pulled us over as we went into the park. We had a very tiny amount of marijuana (less than a gram), that the officer found in our car, but we were not arrested, charged, or issued a ticket for that. Instead, the officer gave us both a ticket for being in the park after hours, which is apparently a misdemeanor. From the research I have done on the internet, it is likely that this will be reduced to a civil infraction in court. Which brings me to my question. Should I get a lawyer for my upcoming court hearing? Or will the judge/district attorney reduce the crime if I show remorse for my actions? I am a college student and would like to avoid the expense of a lawyer if possible, but also do not want a misdemeanor on my record, as I am sure that the company I work for will fire me if I am convicted of a crime.