Unless you have to, due to transport, why carry all that weight on your shoulders Chris?
Never had a wheelie that's lasted a season, they rip and scuff on the floor as there dragged along.
They bang the back of your legs. if slightly loaded to one side they twist and fall over.
They take up far too much room.
Duffle, never had an issue with weight(car park to changing rooms isn't really that far is it?), can fit so so much gear in, and after a full season my kook still looks brand new.
Plus my team mates love me as I take up sod all room in the changing room.