This Lowepro is my favorite camera bag of all time. I’ve learned that lighter is better whenever you are packing camera gear anywhere. The natural tendency is to bring everything you might need, but I’ve found that most of the time you just hinder your ability to take great photos by weighing yourself down with too much gear. This bag helps me pack only the essentials. It’s a small bag but I can still fit 3 lenses, 5D Mark III, batteries and charger, lens cleaning kit, tripod, pocket wizards and water bladder in this bag.
For times when I’m hiking and need to pack more clothing and gear I really like the Lowepro Rover Pro 45L. This bag is big enough for several lenses, camera body, accessories, tripod, water bladder, 15 in laptop, clothing, and a lunch. You can also strap on poles, sleeping matt, or light stands if you can stand the extra weight. I recently hiked a glacier in Alaska with this pack and it was comfortable and convenient.
For more urban adventures or when traveling on an airplane, I usually pack the Think Tank Airport Antidote. I’m always amazed how much I can fit in this bag and it still fits under most airline seats or in the overhead bin. I can pack almost all my gear plus the laptop in this bag.
When I need to travel with light stands, tripods, and other larger photography gear I use the Pelican Storm Trak It’s large enough to pack a ton of gear and the wheels are great for pulling it around airports and sidewalks.