Forget the switchbacks in March. The chute is a much better route when it has enough snow, and it will have plenty in March. Bring stiff boots and real crampons like these. Microspikes and other crampon substitutes won’t cut it. The helmet isn’t a bad idea, but rock fall shouldn’t be a problem. They rent bear canisters where you pick up your permit. You won’t NEED one in March, but the rules might require it.