Mail drops, wow, what a royal pain. They’re kind of fun, kind of not, and definitely a necessity. Some people rely heavily on mail drops throughout a section hike or longer backpacking trip, while others use them sparingly, resupplying in towns along the way. I’ve found a mix is generally best and using post offices and reliable senders is a MUST! Fun fact – post offices will hold thru-hiker deliveries for 30 days (i.e. you can mail to a post office in a trail town and go in/pick up at the post office).
Check guidebooks and be sure to map out your average mileage ahead of time. Creating a sharing a Google calendar is a great way to keep everything organized for your food angel back home. Overall, they are often a must and key to resupplying specific items and gear.