we had a lonnie one last year that i organised but because i did it through a forum there were a couple of cops in a couple of spots along the way
i was leading and the first set of cops were just setting up as i went past and clocked a couple of ppl at the tail of the group, further down the road i got done for ~108kmh in a 100 zone (thought the rural road i was on was 110 )
best way to do it is to tell ppl the rough distance and disclose the route on the day, maybe even do it through facebook messaging
would this be a hobart meet/cruise or lonnie or both?
if you got it big enough it could be both, lonnie meet and hobart meet, head to campbeltown, meet there, head to the east coast, regroup, the split our various ways or head out st marys pass nd drive back through elephant pass
but yeah, heaps of options