During last December's Give All The Things!, Donna at Tallygear offered to send me a free Tummietote belt (and, later, her case for the Dexcom G4 receiver). This happened before I knew I was pregnant, so the size I ordered wasn't intended to fit a baby bump.
But thankfully, this thing is stretchy as hell and lets me transform from "normal-looking pregnant lady" into "stealthy multiple-device-wearing pregnant lady" quite nicely.
And not only is the stealthy part cool, but it also solves the "these pants have no pockets and I have to lug all of this crap around" problem.
The middle pouch (there are 3, and they velcro shut thoroughly, which I'm sure is helpful if you're one of those super active people) even has a window, which is super convenient for quick checks of a CGM graph or IOB on an insulin pump. It lays surprisingly flat, and with the mega-long maternity shirts (what is that, anyway?), it's not even a big deal.
Speaking of convenience, I need to invest is some shoes that don't require anything but sliding my feet into them, because reaching my feet to tie up sneakers is already getting kind of awkward.