I have seen other people say they just rolled it up, so I made that my plan A because it's easy. Have thought about folding, but that's a lot more work and bulkier. I do anticipate trying a few different ways of packing it. It's a sub-20-gram BT-20 rocket with 100-lb Kevlar shock cord, so there's plenty of space to change it up. Different amount/method of wrapping the shock cord vs. the bird tape roll, etc.
The rocket I did that for hasn't been launched yet. Will do a build thread when it does. I have bird scare streamers 2"W x30 and x60 prepped. Might cut one and try z-folds. Altimeter bay in the nose cone, so one of my plans is to compare descent rates with the different lengths.