If this link works, it will bring you to the WS-12 aerodynamic research conducted in England in 2012.
A number of the wind tunnel studies included complete 'skirting' of the rear wheels, and some blanking of the wheelhouse opening underneath the vehicles.
It's most prudent to consider vehicles on a case-specific-basis, as they're all a bit different from one another.
If any of the test vehicles are geometrically similar to yours, it may suggest a 'trend' that you might also experience.
https://studylib.net/doc/12731012/ws...gs-21-february