YMMB - YTDN is 20.9nm so you are good to go; see you there for crayfish
(if you are allowed to land)
You can also come back via Tyabb and be less than 20 miles.
Certainly much better than flying around exclusively in the trailing area
The RA-Aus nav rating is the same and every so often someone asks if they can bunny-hop their way around the country.