camping = pull up somewhere and pitch the tent, you may be near a lake or some hiking, but you generally aren't going far with all of your gear, also call this car camping
backpacking = putting all of your gear in a backpack and hiking to your destination, packing up and continuing on to the next spot or head back. There's no set milage or time you need to hike in order to call it backpacking, but I'd say it's where you start thinking about the things you don't need to bring with you because you don't have room in the one bag you have or it's too heavy
camping = pull up somewhere and pitch the tent, you may be near a lake or some hiking, but you generally aren't going far with all of your gear, also call this car camping
backpacking = putting all of your gear in a backpack and hiking to your destination, packing up and continuing on to the next spot or head back. There's no set milage or time you need to hike in order to call it backpacking, but I'd say it's where you start thinking about the things you don't need to bring with you because you don't have room in the one bag you have or it's too heavy