Trekking poles are a Godsend. If you're hauling any sort of load, traveling up a trail, down hills or up hills, trekking poles can make your life so much easier and reduce risk of injury to joints. When powering up hill, you can use your arms as well as your legs to increase efficiency. Going downhill, your knees will thank you. There's also a number of tents out there that allow you to use your trekking pole in the structure of your tent which reduces the need to use a tent pole and also reduces overall weight.