I'll do you one better- take ~6ft of paracord, tie a simple loop in one end and a stopper-knot in the other. You can then use the noose-end to start a loop and wrap the remainder (zig-zag) around the rolled clothes and tuck the stopper knot underneath the criss-cross sections.

You go from "loose rolls of clothes" to "solid bundles of fabric". Makes it so you can take in/out individual items rather than having everything randomly unrolling every time you try and pull something out.