Shop this travel writer’s top picks from Free People, Damson Madder, Spanx, and more.Credit: Travel + LeisureBest Travel Pants DealsOprah-worn pants: Spanx AirEssentials Wide-leg Pants, $77 (originally $118)Fun fall print: Free People Nice Choice Stripe Pull-on Pants, $59 (originally $98)High-quality fabric: Petal & Pup Ember Cotton & Linen Pants, $36 (originally $89)Fall weather has officially hit New York City, and after basking in the crisp, …