I recently noticed a few videos of people running whitewater in Alpackas with spray skirts that were not wearing any helmets. I don’t believe some people realize how incredibly dangerous this is. Even a tiny capsize can knock you unconcious & drown you in seconds, even in class II rapids. My helmet has saved my life at least a dozen times, and helmets should always be worn any time a spray skirt is involved (trapping you in the boat at least for a split second when you flip). If pack rafters are to be taken seriously, then helmets must be taken seriously. Just a small thought to anyone not using one or bringing one just some of the time.