I normally don't shoot events per se, but my regular day bag is a Lowepro magnum that's ancient and no longer in production. It holds 2 D series pro Nikon bodies, an 80-200 or 70-200/2.8 as the case may be, 17~35/2.8, 28-70/2.8, 10.5/2.8 lenses plus a 12-24/2.8 or f4 as required, also a 50/1.4...