Add Filter options before Generating "Calendar at a Glance"

As we have a LOT of activities between our different Patrols (11yr olds, Scouts, Varsity, Venturing), when I print the YEAR AT A GLANCE I want to be able to filter out the noise, and show only the items pertaining to a specific group (patrol), a combination of patrols, or a just to specific person (my child, or myself as a leader).