Melbourne CBD to Yea is approx 100km, with whittlesea just less than halfway. But if you want to be at Yea at 7am, that makes for an awfully early start…
If we could do some car sharing (easy for me to say, I don't have a car!) I think the easiest way would be to do the drive to Whittlesea or Yea (if being dropped off by somebody not cycling)
Staying in Flowerdale could be an option, but it still leaves the question how to get there. From the vline website:
Generally V/Line coaches do not carry bicycles, surfboards, surf skis, sailboards, canoes and similar items. There is an exception for coach services along coastal routes where surfboards and boogie boards may be carried subject to available space on the day of travel. Passengers are reminded that this applies to both the forward and return legs of the journey. Call us on 136 196 for more information.