Tough call. South is pretty and it's where everybody seems to look & image, but a northern aspect in a northern state adds some novelty. Yes, M57 is a beauty, and so is the Veil, or North America Neb etc etc. It'll come down to what you are into, and what the LP situation is. Deep or shallow sky, suburban or rural skies.
Planets, Luna, Solar - none of that in the Southern half (in this hemisphere anyway) so not much change happening there, except in 1987 and when there is a comet
. Although the solar system object do ride high over brisbane so will be seen from the South facing site most times as well.
Get a portable pier or put something on tracks & move between the two sites as you please.