Hey @everettchu, what did you end up buying?
For business shoots, I use this (the 20L): https://www.peakdesign.com/product/bags/everyday-backpack
When it comes do a day hike, I’m torn between two bags. The Tamrac Evolution (similar to this one: https://www.tamrac.com/products/evolution-8) carries everything I need beyond camera gear, but it’s hard to take on and off all the time, and doesn’t sling from front to back very well. The waist strap was also made for thicker people. 🙂 Canon’s Deluxe bag (https://www.adorama.com/cagb10eg.html) is awesome because it swings from back to from very easily and doesn’t take much to open/close. I sometimes even wear a small backpack at the same time to hold non-photography things. I usually go for the Canon bag.
I’ve been enjoying fiddling around with a camera holster system recently, wearing everything on a heavy duty belt. It’s good for events, but it’s difficult to protect gear when doing hiking or outdoor photography. I can get you more details/links on this if you want. It’s sort of a mix and match setup right now.
I haven’t tried very many other camera bags, but I do know that when it comes to backcountry or overnight hiking where I need a ton of stuff beyond camera gear, I use a regular 80L backpack and then throw in the bare necessities on the holster system. This allows me to still take pictures after hiking out long distances.