What is your favorite camera backpack?

I didn't see a requirement by the OP for the amount of gear, but the Lowepro Vertex 300 AW has room for a lot of gear if necessary. My gear is pictured below.

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Hands down, Think Tank Photo Streetwalker!

Mind Shift's Rotation 180. It allows you to access 50% of the space without removing the pack. It's a knockoff of ThinkTank's Rotation 360 which is my favorite pack of all time.

The 180 has some update features, such as space for a Camelback. The Pro model has a number of useful bells and whistles and is pricey, but the functionality is beyond any pack of its kind and size. It will hold a moderate amount of gear, which is fine, as for me, the larger packs only make you carry more equipment. That limits how much you want to wear the pack.

Love my Lowepro Pro Trekker 400 AW

I never wear it, but it holds all my gear except studio lighting. Tamrac 787. I found an excellent used one on Ebay for $100 ($440 new, online retail). I keep 2 gripped bodies, 4 lenses, 2 AA Chargers, 2 Canon Chargers, Meter, ND and PL Filters, 16 Canon batteries, 16 AA batteries, 2 Flashes, and all USB cords I will ever use, 3 Triggers, etc. I got 4 Cloth Pencil Cases from 5 Below and organize my small parts in them and they stay in the outside compartments. It still only weighs about 35#. It really helped me get organized!

I have the Amazon Basic camera backpack. It works for my needs, kinda running out space now lol.

Gura Gear Bataflae 32L and F-Stop Loka. Both hold a lot and are comfortable with heavy (30+ lb) loads

I've owned a few different sized backpacks and I'd say my F-Stop Guru is my favorite. The build quality on it is very good and I like that it leaves room for taking none photography related things as well and that you can change the ICU to match your needs for that trip. I also find it to be more comfortable to wear then others. The only bad thing I could say about F-stop is they are very pricy but, worth it now that I've owned and wore one. I also have a lowepro flipside sport 10L & 20L both are nice bags also, I just like the guru better.

I love the secure feeling of the Lowepro Flipside series.

f-stop guru

flipside 15L is my second favorite

The F-Stop Guru looks fantastic! The internal options are

Back in Feb we were in Hawaii and I slung the Crumpler 5 Mil. Access to gear wasn't a problem but a side slung bag hoofing in town and along the beaches 6-8 hours wasn't conductive. I'm one of these skinny types so even though the gear package wasn't "heavy" I'm not up for that unbalanced carry.

ra40 wrote in post #16909110
The F-Stop Guru looks fantastic! The internal options are

It is

Kata Mini-Bee 111 UL. Very versatile.