Hi Kriz and Emily,
Welcome to the forum. Congratulations on your escape from Melbourne.

The weather in Qld is definitely nicer.
Yes - the glasshouse mountains has lots of tracks, and ranges from simple tracks to extreme tracks. Just out of curiosity, do you almost take the 200 onto the beach? We have Bribie, Stradbroke, Moreton and Fraser Islands all not too far from Brisbane. Well, Bribie Island is connected via a bridge, so suitable for a day trip. As it gets warmer, we will organise a few dinner/champagne afternoons on Bribie Island, i.e. arrive in the afternoon, and when the sun sets, cook dinner on the beach while the kids run through a shallow and very warm lagoon.
There are also several 4x4 parks within 90 mins drive of Brisbane that are worth trying. But, probably almost as good yet more fun for the family are some of the national parks. Places like Bellthorpe and surrounding parks are very interesting to explore, and offer a range of tracks .... and are free to enter.
We have the club's AGM this Sunday (so a longer than usual meeting). You're more than welcome to attend the meeting, but also feel to come along on a trip that may interest you and/or your family. Just keep an eye on the trip calendar on the forum.
Cheers
Dave.
BTW - looks like you have a great setup, i.e. vehicle and trailer. They look great in the photo. And being a Toyota, they are made to be on the beach, like the 80 and 120 series (sorry - an in-house joke. I have a Prado 120, and it loves the beach too).