Hello FromZStore,
Oh, fleece scarves are fun to make and go so quickly.
I personnally do not hoop the fleece in fear of leaving any hoop marks. Water Soluble stabilizer is placed in the hoop. I am sold on BadgeMaster (which is sold here on ATG) and use BadgeMaster for 99% of my water soluble projects. If you feel uncomfortable about hoopless embroidery, spray some temporary adhesive on the back of the scarf; do so very LIGHTLY. Spray may be difficult to wash out from fleece as it goes into the fibers. Definitely use a Topper Water Soluble stabilizer on the top of your project. You are set to go.
Good luck and hope the receipients will love their new scarves.
Joan