Tesla are holding an event to mark the planned installation of the 100 megawatt battery at Hornsdale, near Jamestown in South Australia and it looks like they are inviting Tesla owners. The event is around 240 km drive north of Adelaide. There are 4 destination chargers in Clare (2 at Motel, 2 at local store) which is 100 km south of Hornsdale. If I drive direct to Hornsdale for the event and back to Clare (340km) to overnight, I should make it on one charge is a S85 (easily) or X75D (just). The concern is that if a number of Tesla owners attend then there may not be enough chargers to allow overnight charging to make sure I can get home the next day. Any suggestions?