The Difference between Travel Backpack and Hiking Backpack
Before you begin shopping for the right backpack
, it's important to know the difference between travel backpacks and hiking backpacks. A travel backpack is a backpack-suitcase hybrid with a zippered side panel similar to a suitcase. Hiking backpacks are the more commonly seen cylindrical top loading packs with straps, clips and a top lid. Some people have an opinion that hiking backpacks are only suited for the backcountry and has no place for the backpacker, I disagree. What works for you ultimately comes down to personal preference and style of travel. Travel backpacks are great for easy, organized access to gear and transporting from hostel to hostel. They also function well for short walks or even as a daypack.
On the other hand, if you possibly have camping or long treks in your travel plans, you may want to consider a hiking backpack. Hiking backpacks are designed for comfort, proper weight distribution, and toughness. Unlike a travel backpack, hiking backpacks will have enhancements like full-sized hip belts, shoulder and back suspension systems along with plenty of load bearing straps to mitigate discomfort. Granted the top down packing isn't as convenient to access your gear, but that's part in parcel to proper weight distribution. A good compromise would be to get a hiking backpack with side load access.
I am generalizing a bit as they do have travel backpacks that are in the upper capacity range with more advanced suspension systems, but if you're going to get a 70L travel backpack, you may as well go with a hiking backpack. Trust me, you'll be glad you did for that unexpected 20 mile trek to the next town.