Travel up north in winter 2013

My husband and I are planninbg to travel for eight (precious) weeks next year, around mid June-mid August (to miss the southern winter hopefully!) in our caravan.

We had planned to go to the Centre then on to North Qld then back home (Yarrawonga, Vic).

Having studied the tempeatures for both these areas this winter, we are now in a quandry as to which way to travel!

Any suggestions/hints?