River 7, the general idea is to get them down the slide & away from the aircraft. I've flown for several airlines and all mention sending pax upwind and generally 200ft is considered a min safe distance.
Of course it's assumed most incidents will happen on airport, so by the time the CC are out themselves we should have ARFF on scene to direct. If not, that's what megaphones are for... If the emergency was anticipated then obviously we'd have time to have chosen Able Bodied Passengers briefed to assist and direct the pax to safety ("stay on the grass!" From one trainer comes to mind)