I have wrapped them, as an experiment, and it worked great. It isn't really necessary unless you are trying to control color or bark texture. But, the two times I did it, the results were excellent, beautiful color, crisp thin bark and very juicy with melting texture.
I'm feeling bearish, and I'm packing a Wusthof Grand Brisket slicer from MABA
"perhaps...but then again...maybe not..."