First, misdemeanor warrants (or felony warrants for that matter) will not be discovered if you are traveling inside the United States and are not in contact with law enforcement. Second, misdemeanors are not usually listed in the National Crime Information Center (NCIC) files because you may not be extradited for these offenses, due to the issuing agency's budget. So, once you are out of state, you are safe until you get close enough to the issuing jurisdiction for them to come get you. Most of the time, that means once you are back in the state where the warrant was issued, you can be arrested. So, go. Mind your p's and q's and get the matter handled when you can.