just bought a new tool bag! it's a diaper bag. got it used for 5 bucks so I figure it's worth a shot. super padded on the side that touches my body, has front pocket that are vertical to hold my hand tools, and the inside is bright orange. we shall see how tough it is. (eventually, as I'm not sure I want to risk another junkyard day for a while) Tomorrow I'll start transferring tools from my Swiss backpack (which has set a very high bar in durability) and see how it all fits.
if anyone is looking for a budget junkyard backpack, seek out a Swiss brand from your local resale shops.