A few friends and I were smoking marijuana on a school playground and after we were finished a policeman came in and told us all to stay put. After finding our pipe, he had us throw it down the sewer. Eventually he gave us all tickets for trespassing at night. All of our records were very clean to this point and we are not regular smokers. At our arraignment, should we plead guilty or not guilty? What is the best and worst sentence/fine we can get?