welcome to PIA and we are Glasgow Rangers as well as Chelsea Supporters in Adelaide.
I'm pretty sure your kids will cope fine.
We moved here in march 08 with a 9 year old and 6 year old and they have adapted so well, it has shocked us.
My parents and also my m-i-Law have visited and are a bit upset at how well the kids have coped (I think secretly they were hoping the kids would miss them too much and want to come back to Scotland, but alas it isn't the case).
What I have found is that as long as you have a good strong family unit, you will cope well as long as you all look out for each other.
You and the kids will be fine and just remember why you are doing it in the first place, it's not to be rotten to everybody, but to do what you think best for you and your family.
Good luck x