Henrik said
if you route different snare mic channel's outputs to a bus, turning the level of that bus all the way down will make all the snare channels silent. Is that what you want to happen?
By routing all the snare outputs to the bus and manipulating the bus fader the OP should be able to manage all the close snare mics with the bus fader. The only reason I mentioned using macros was in addition to the close mics, there could be several bleed sources that wouldn't be manipulated by using the bus fader AND I think macros are very cool and powerful. However, perhaps I was just over complicating things.