Transport definitely! I truly can not understand why it is considered a good 'wedding' idea to spend hundreds of dollars on a truly beautiful vehicle, that isn't going to be used for most of the day! Yes it will be in a few pictures, and therefore there are the 'bragging' rights of 'look what I had!' But personally, sitting in the back of my dad's car as he is driving us to the place seems fine to me!
We are actually planning on using public transport. Myself, parents, BM and photographer are going to catch a maxi taxi to the ceremony location and then after the ceremony everyone will leg it to the nearest train station and catch the train to where the reception venue is (the nearest station is only 200m away). Aside from the fact that it is saving us a good 300 - 400 buckaroos, we'll have the laughs of everyone being in the same train carriage for the length of the journey!