Is there anywhere in SE QLD with big red size sandhills to drive on?

Have you given Moreton Island some thought?, you could try out
the Dunes on the Desert,it's not a huge challenge but you will
have some fun.

Cheers
Daza

If you are traveling west then Big Red won't be anywhere near the challenge it is if going east. Are you returning east or going down the K1?

If you got over big red in two attempts, then you did bette than many. What pressure were you running in your tyres. Sometimes when it is really dry, just a change of 3 psi such as from say 18psi to 15 psi can make all the difference.

Try getting up the track to Moreton Is / Double Is Point lighthouse.

Reckon it is twice as high/long as big red.

Even walking up to the light house is hard work.