You might put in a call to the DA's office and explain your situation--that you're looking at traveling for the summer and would like to ascertain whether that'd be a problem if they press charges or decide to set a new court date. A call to the DA's office isn't going to cause them to be any more likely to charge you. In some ways, if it's anything like the urban DA's offices here in Texas, it may even prompt them to drop it entirely. They have lots bigger fish to fry than a little paraphernalia misdemeanor.