I'm seeking a chest/cross-body/fanny-pack-esque bag I can comfortably carry my iPad Pro 10.5", a thin portable power supply, keys, etc. You know, not a purse. Ha! OK, a purse. I have tried a few options like a crappy one I found in Tokyo, an Under Armour sling backpack (definitely a fail), and now an Oakley 'street belt bag' and just carrying the iPad separate. Any suggestions?