Our Philmont Rangers thought that an inexpensive rain suit was far superior to the most expensive poncho. Water resistant fabric may handle a light dew, but will become water logged and soak the wearer after only a few minutes of an afternoon Philmont rain. Prior to going to Philmont, you should test the seams of your rain gear. Your neighbors might get a chuckle, but wear a light colored t-shirt under your rain gear and get sprinkled with the water hose for about 10 minutes. This will provide a good test of the seams to determine whether they need to be resealed with tent seam sealer.
Most crew members wear hiking shorts and t-shirts throughout their trek.
What we have found that works the best is to have a set of hiking clothes and a set of in-camp clothes. After setting up camp, wash the body salt from the t-shirt, shorts, and socks you have worn on the trail. Put up your clothes line and hang your hiking clothes up to dry. In the morning, even if your hiking clothes are not completely dry, put your t-shirt and shorts on. Don't worry, they will dry out while on the trail.