Not necessarily always used for excursions like camping, travel backpacks will often have rolling wheels on the bottom. These can be used for camping but definitely will be beneficial when traveling by air, bus, or train. Whenever you have to wait in lines, these backpacks that have wheels allow you to easily move within the line without bending over every time.
You might consider getting better quality travel backpacks that will be fairly durable for the abuse they will take whether it be maneuvering through airport terminals, being stuffed above airplane seats, thrown around in checked baggage, etc.
Take a look below at some of the available travel backpacks shown on this website.
