Real cheap hint: Weekend newspaper up the front of the jacket.
Really- I find a balaclava under the helmet plus wet weather gear over normal riding gear is pretty snug. Thick lined winter gloves are good, and "Little Hotties" in your shoes round out the good economical protection against the cold.
I've even used the "little hotties" in the back of the gloves. About $2 each and last for 8 hours. They take a while, 30 to 60 minutes, to activate though.
As Biggles said, wet weather pants over jeans is very good. It breaks the wind and prevents it getting through the jeans. Even tracky dacks or tights under jeans can help.
Upper body, Bonds singlet, t-shirt (merino wool), shirt (flannelette), jumper then jacket and if necessary, the newspaper. Layers are good, because as the day heats, up you can peel them off to cool down.
The lightweight balaclava can be had for under $20 and keep the ears, head and neck warm where most body heat is lost.
Woolen or Wool blend socks. I use the Explorer ones you can get from Woolworths or Coles for under $20 ($14 last time I bought some a couple of weeks ago). I've even double socked in really cold weather.
I had a set of gloves I bought for my Southern trip, and they cost me around $80. RRP was $120. They were an RST winter glove, and at -1 °C my fingers were mildly uncomfortable.
What helped with those gloves is they were more like a gauntlet, they went at least 75 mm (3 inches) past my wrist, so I was able to tighten them up over the sleeves of the jacket. That prevents the great from escaping there and makes a big difference. Especially if you hit wet weather.
What have you got planned for the return trip? Detour through southern Qld for an impromptu RTE and bed, shed and fed?
Have a safe and enjoyable trip?
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