With one of those rigs on, I would use my medium dslr gadget bag from amazonbasics.

Big enough to hold a couple spare lenses, batteries, and cards, but small enough to stay mostly out of the way. I'm pretty tall, so there's room for things to move around each other.

Day to day use for this bag is carrying an A7R and spare lens, for size reference.

I have the Amazon Basics medium dslr bag ($17)

It has an ipad slot which is useful for field editing (if you do that). It's extremely light and inserts are obviously adjustable. I have an e-m10 in it, 12-40/2.8, 25/1.7, 40-150/4-5.6, 42.5/1.8 (the yi lens), spare battery and charger, and polarizing filter and step up rings. At this point it is quite bulky with all that stuff shoved in it, and if i'm wanting to go light i will take out chargers, a lens or two. I've hiked several miles with it and it hasn't bothered me any, even while carrying a child on my shoulders through much of a hike. If I am going to travel further than that or carry a tripod I would use a backpack.