Frac ball dispensers as well systems and methods employing such are disclosed. Configurations for remotely moving the frac ball dispensers in the vicinity of an open wellhead as well as remotely activating and verifying the dispensement of frac balls from the dispensers into the open wellhead are specifically provided. Configurations of frac ball dispensers to control access to frac balls therein as well as the dispensement of frac balls therefrom are also provided.