On Saturday morning, my 21-year old son Emmett took off on an extended road trip to explore the United States and, possibly, points south in Mexico and Central America. He loaded the last of his camping gear into his car and we said our goodbyes. Although I tried very hard not to, I cried. Aside from a few stops to visit friends in a couple of states, Emmett has no firm itinerary. His plan is to be nomadic. I won’t know where he is. I…