Or am i over thinking this? A good friend of mine is doing one for charity - she basically has to drive a tank, a fire engine and something else (can't remember sorry) for charity.
But, but, don't women drive these vehicles every day in their jobs anyway? And as for the term 'ladies' YUK!
I have driven a medium sized lorry in the past (house move, work etc.) - shame i didn't think of getting someone to sponsor me - after all i possess the wrong sort of genetalia .