Raven,
I grabbed a sling bag by Champion (actually, InGear but licensed to Champion) at Target for about $20. I'll see how it strikes me carrying too and from work and around town this week as an EDC. If it doesn't cut it for my purposes, I have a newphew who I'm sure will be glad to have it.

Right now it's got:
> Work stuff: binder, file folders, portfolio & pad pad, pens, calculator.
> Cell phone, charger, earpiece.
> Tools: Folder (a Gerber, to be replaced by a Ritter RSK Mk1, soon as it gets here), LM Wave (old style, my preference), Stanley wonder bar.
> Light: Photon II on carabiner on exterior; Brinkman AA in bag.
> Shelter: PVC poncho, space blanket.
> Ritter PSK with following added: repackaged (ala Ritter) Pottable Aqua, 2 Gerber milk bags, 5 Coghlan wind/waterproof matches plus striker.
> AMK Ultralight .5 FAK.
> Misc: Leather work gloves, a neck lanyard, 20' paracord, bandanna, a flatpack of duct tape, 1 N-95 respirator.

Can you fold an N-95 w/o killing it's effectiveness?

We'll see how it goes. If I like the concept, I may upgrade to a better bag. However, I have to avoid a "military" look. All black might be OK, though.