The key for me is doing it the same way each time I load the bike.... makes finding stuff easier. Not much fun searching for that one item and not having any idea where I'm going to start looking.
I pretty much know where everything is.... well at least what bag it's in.
As for balance... All my camping gear goes up front. Everything else goes out back. Small items and snacks go in the bar bag.
I don't know if I've ever seen two people pack the same. You will find what works best from much trial and error.
If you bring olive oil..... make sure it has a screw lid...

Trust me.