I decided against using shrink bags and stretch wrap.
Instead, I went with construction wrap, Gorilla tape, and staples.
Left rear wheel (#3)
Right rear wheel (#1 - prototype - staples only)
Right front wheel (#2 - first to use Gorilla Tape)
Right front view
Left front wheel (#4 - one plastic support snapped off within the underlying aftermarket wheel cover)
Preliminary results indicate about a 6% gain in FE.