Don't let a trip of a lifetime to Machu Picchu be ruined by forgetting the right gear. I learned this the hard way when I packed at the last minute and left my rain jacket behind. Luckily, a friend saved the day with a spare-but you don't want to rely on chance. Packing smart doesn't mean overpacking. Whether you're arriving by train, bus, or on foot, a few key essentials can make all the difference. Think comfortable hiking boots, insect repellent, and a lightweight daypack.
Most travelers know about liquid restrictions at TSA, but there are some exceptions that allow you to bring certain things in larger quantities. Prescription medications, baby formula, and other medical liquids are allowed in containers greater than 3.4 ounces, but they're still among the most common reasons bags get pulled aside. "Even though they are permitted, officers may need to screen medically necessary liquids if the quantity is greater than 3.4 ounces," a TSA spokesperson says.