I'm going to the store soon 2 buy swiss voile so I'm going to make a couple bags. My plan is to put one bag in and mix the grains then put the other bag right on top of the other and mix the other grains in. Essentially both bags will be wrapped around the kettle and if they're big enough I should be able to stir both at the same time because of all the water then I can pull them one at a time it squeeze the s*** out of them. Insert sac squeeze joke here
Sounds like a hassle to me, but give it a try, maybe you'll love doin it this way.
Fwiw I think I would try 2 smaller bags side by side clipped to the kettle rim, then again I'm sold using a single bag.
Denny's mantra goes something like this.
"Best beer possible with the least work possible while having the most fun possible. "