Actual Lug Nut Size, under those covers, is 7/8". I've been able to do ours with:
1. Electric Impact Wrench. My cheap Harbor Freight one will do it. 7/8 impact socket from Amazon, looks like the one I posted above.
2. 3/4" drive sized breaker bar with 7/8 socket
3. 7/8 end of a NAPA "four way" truck lug wrench (the cross-shaped ones)
4. Lug Wrench that came with the E450 chassis, WITH a piece of pipe extending it
A 1/2" drive breaker bar and 7/8 might do it too, but torque spec is 140 and when you work that high with 1/2" tools a lot of effort gets lost in twisting and bending the tool itself.
Air up All Six before you go to move this coach any distance!
And keep us updated as Dennis asks!