OK, I'll share my OCD solution to storing bags (we also reuse them for trash in the Cruiser).
This is something to do when you just want to have the zen experience of folding bags! Lay each bag flat, tuck in the edges neatly, fold lengthwise into to about 1/4 of the width of the bag. Prepare several this way. Then roll them up tightly, one at a time on top of the previous one (this way they peel off one at a time, not unrolling the whole wad!). About 8-9 bags have a 1.5 inch diameter, about 2.5 inches tall. Secure each packet with a rubber band.
Otherwise if I don't want to fuss with rolling, I just line my trash with 4-6 bags at a time, and when full, pull out the used one, and a fresh one is already in place! Helps contain drips if I inadvertently line the trash with a bag with a pin hole in it.
I TOLD you it was a little compulsive!