A new feature in Blender 2.91 could probably be useful for sculpting the scarf: It's the "Cloth Collision " here. You can turn it on here (red circle):
I saw Daniel's video pretty much at the end of recording these videos and shed a single tear as that would have been incredibly useful throughout developing the scarf... :D If you are using 2.91 and onward, I'd highly recommend taking a look at using it when you can! -Chunck :)
I've already tried it but I definitively need to take a closer look at how to set it up effectively. So I worked without it:
This concludes the modeling phase.
Loving the more top-hat approach you've taken, it's really coming along! -Chunck :)