you could always ask the secret service......not sure if they'd tell you either.
your best bet would be to call/write the kerry campaign and ask them directly.
then again, If I were someone that had the protection of the USSS, I wouldn't want anyone told when they will or will not be there either.
GeorgiaCarry.org is an influential civil rights organization committed to not resting until the State of Georgia ceases all infringements upon the people's natural right to keep and bear arms that is protected by both the constitutions of Georgia and the USA. It's members include prominent legislators, captains of industry, members of the armed forces, police officers, parents, academics, lawyers, and citizens from all walks of life.
Vi et Consilio