Actually I might want to.
I'm currently in Victoria at the moment for work, but I'll be going back home just for the long weekend.
7Mile beach is my local (I live in Gerringong usually), so it will be nice to do a downwinder there with someone else - practice for when I want to do it by myself.

It would be hard to bail and hitchhike back once you get going, because it is very hard to access the main road from the majority of 7Mile beach. It would be a long walk along the sand. Only places (that I know of) where you have access to the road would be Gerroa, 7Mile beach carpark (about 2kms from Gerroa), then Shoalhaven Heads.
PS: No need for a bailout plan. That's what a patient girlfriend with a car is for.

We would just have to make it to a road.