I have adaptations that took me a few Burns to settle upon, so I don't mind sharing, weirdscience, however, they are being severe with you for your own good. (Btw, If you can take it in good humor and learn to use the "search" function or lurk + read more, you stand a chance of surviving out there, particularly without being a burden.)
I use a gorgeously dust-colored backpack from the Army/Navy store. I find that starting out dust-colored (and probably used) saves me any obsessives-compulsive stress about how dusty or abused it is. Ha! I have caribeeners down the back (on handy fabric loops these Army/Navy bags so often have) attaching items I use a lot so I don't have to unfasten it every single time I want something, like my goggles, a camping cup, a flashlight on a loop, hand sanitizer, etc. Lighter caribeeners are actually much better (they drag the pack down less, with their combined weight) as long as they aren't totally flimsy ones. The weight of the metal creates a little stress on the fabric, cumulatively. This goes against the hardcore I-love-giant-pieces-of-metal instinct, but it extends the life of the bag's seams considerably.
Backpacks are great for daytime bike riding.
Next year I will 1) embellish my bag more 2) light it even better. (Lighting your pack makes you slightly less likely to be run down by an art car.) 3) I might make a matching playa coat & bag, for ultra-fabulousness.
After several days of carrying a backpack while wearing a tank top or similar, dust trapped under the straps can really irritate the skin. (Solution: wash off dust with soap and water and maybe a little lemon juice, really gently (don't scrape), apply neosporin and let it sink in, & carry the bag differently or carry a different bag). It's nice to have an alternate bag whose straps and/or carrying area rest on another area of the body, like a messenger bag. Having to take a backpack off every time one wants something can also be annoying, especially during a photography expedition.