That's probably one of the reasons why a record quarter of registered voters have already voted before today... which will start to changes the whole campaign process to woo people from the start, as polls have shown that the election result would be different to today if it was held on any previous weekend.
I always thought that you could only pre-poll vote if you had a valid (proven) reason for not being able to vote on the day, as there is a reason for having as many people as possible to vote at the same time, as people voting later may change their mind knowing what others have already voted (a bit like the presidential elections in America that have results from the east coast announced before the west coast have finished voting... which they shouldn't be announcing until after polls close in all states - and here, but we don't have enough seats in WA to alter the outcome from early results that only come in if it is a landslide).