They plod past my driveway, the last one before heading out to the remaining 750 miles of the Arizona Trail. One part of me wants to open up to the spirit of adventure emanating from them. But it is difficult. It would be easy to fantasize about camel trekking in Morocco, or riding long sections of the Silk Road, or sea kayaking between Asia and North America, across the Bering Strait. But walking, plodding, and trodding in Arizona heat? They are visualizing something that I can't, although I would like to. All I can see is a slow -moving sport that lacks a ll pizzazz or sex appeal. Their sport is the perfect activity for a puritan's Sunday. Perhaps I am being unfair, for demographic and cultural reasons. Hikers tend to be Greens, urbanites, Democrats, veggies, etc. A few of them had real panache. For example I have seen a couple hike with silver umbrellas fastened to their backpacks. Correction: parasols. And of course that appeals to the romantic imagination of a r