The short answer is YES.
The long answer is this: sleeping bag zippers are surprisingly uniform, and the two zipper sizes we have chosen will accommodate the vast majority of bags out there. On top of that, we have the luxury of knowing which bags we are trying to accommodate BEFORE we go to production. Yay Kickstarter for that!
We will survey the backers at the end of the campaign to dial in the exact numbers of each zipper configuration.
The BarkerBag is designed to work with zippered, mummy-style bags, so as long as the zipper on the side does not go all the way around the foot (allowing the bag to be completely spread out like a comforter), the BarkerBag will work for you!