Leave your sleeping bag at home. First thing you want is lots of water,about 6oz.
Heat stroke is very serious and only compounded by the logistics of the ravine.
Next is sunscreen. You will be baked from all angles,including from underneath. Dont be a goofer and try skiing the headwall in shorts and a t-shirt. Spring snow is very sharp little ice crystals and i have seen folks fall and become a bloody mess because they weren't properly dressed. Last is common sense,especially if this is your first time in the ravine.