I didn't, but I could have I suppose.
My setup is:
1 rear pannier with sleeping bag, tent, thermarest, pannier covers.
1 rear pannier with clothes.
1 front pannier that's essentially the 'kitchen'
1 front pannier that's odds and ends.
1 handlebar bag that's my 'office'.
There's enough room between the panniers to allow for a trunk bag. Generally, though, I twist a bungie between the two bags and use it as a clothes line to dry the previous days clothes (which I sink wash after making camp.)