Noosa looks nice i'm sure there are so many amazing places we could go...
I was thinking of maybe somewhere local and just take SIL's car or something, i really have NO IDEA... really need to think this one through i guess.
Don't think we would do the city, it sounds nice but i'd hate to pay for a hotel etc and then go and see things we could see any other old time IYKWIM.

I might have to ask DP what he would like to do aswell and what kind of budget and go from there

Keep the ideas coming PLEASE.