Could be up for that one.
One word on Narbethong at the moment though, 2 weeks ago the triangle between Valley Farm/Marysville/Buxton was pretty boring as they'd run a dozer over everything except the big rutted hills. Everything in between is flat.
Might be worth a look over the other side of Marysville around Strickland Spur or up Andersons Lane towards Anderson's Spur Tk. Haven't been there for a while so it could be flat too.
Cheers,
Thad