So I'm currently going through the same deal, but mine is because I live close enough to work that I want to walk to work but want some "supplies" for if someone decides they want to get too friendly. I also want it to be dual purpose where I can use it in the woods as well, carrying binos and range finder.
I ordered the AGC Rascal, Marsupial multipack and FHF chest rig with their big pocket.
The AGC is big but it's one big compartment with a couple smaller organizing pouches inside but it also comes with bino tethers, also has a pocket on the back for the pew pew. They market it as a fly fishing rig as well. It was returned.
The Marsupial mulitpack was smaller than I thought it would be, so that one was pulled out of the packaging, unzipped the pockets and it went right back into the packaging to be returned.
The FHF chest rig is a nice chest rig but it's also small, it's one big pocket and even with the outer pocket, it's still not going to really suit what I'm looking for. That one will be returned as well.
I'm also thinking of just using my bino harness instead, it's set up with the "supplies" already, I can take the binos out and have a compartment to stick snacks and other little needs for the day at work.
I've looked at the HPG stuff, but it came down to the same thing as the other 3 that it didn't look like it would do what I was looking for.
I've spent a stupid amount of time trying to figure out what I'm really looking for, at the end of the day, it was probably the AGC Rascal that would have fit my needs the most but that was returned, so oh well.