If your cases are in Greeley it makes a big difference if they are municipal court or county court. You will be treated far better in municipal court. It would be in your best interest to contact an experienced criminal defense attorney to schedule a free consultation and see if your cases can get resolved with a global disposition with the prosecutor's office.
Absolutely, but keep in mind that just because you hire an attorney doesn't mean the case will get dropped. No attorney can guarantee you that charges will be dismissed. I used to work as a District Attorney in Weld County and I can tell you from experience that hiring an attorney over there will serve you well. An experienced attorney will evaluate the evidence in your sister's case, look for constitutional violations, and negotiate with the DA to limit her liability.
If your court appearance is at 1:00 pm in Weld County you are likely appearing in Div. A of the Weld County Court house. I used to be a prosecutor in Weld County and I can tell you from experience that if you show up 2 hours late a warrant will go out for your arrest. If an attorney enters on your behalf and requests a pretrial conference your court date on the 26th will get continued to a later date.