2 epipens overkill? No, unless your trip out by helicopter is very quick. Suppose the benadryl dosage taken after doesn't help soon enough with the airways then 3 or even 4 doses would be required during an EVAC. BTW, on my course we were shown how to get that extra dose out of an existing used epipen by doing some minor surgery on the pen itself. And if these pens are for personal use then make sure you carry ON YOUR PERSON and your other guide(s) have a spare one or two in the group kit. If somebody has to make a 300 yd dash back to where you last left your pack and your epipens, then you might be in trouble.