Detachable backpacks with daypacks are the best backpacks for backpacking if they fit your body and your backpacking goals. It should be comfortable, spacious, and well-made. My list of backpacks with detachable daypacks includes many excellent packs.  As for my favourite backpack with a daypack, Salkan's The Backpacker beats all the others. Practical, comfortable, and long-lasting, it is a 2-in-1 bag that is thoughtfully designed.