With flat pedals on the trails it does not hurt to wear shin guards of some type. I do not have big feet (10.5 C width) but still found it beneficial to go to a wider pedal, the Stamp 7 in Large that gives me a larger target and allows for more movement of my foot on the pedal.
Pins can be adjusted in height (and a small washer added) and it is not necessary to have a pin in every hole of the pedal. Different approaches as to which pins to leave in, often only the ones at the outer edges of the pedal.