Sounds like fun! I haven't been around Tassie, but some friends have with their kids in a campervan and they had a great time .

In September/October of last year we took our 3 kids on a 6 week trip from Melbourne to Perth (and back) towing our caravan, we had the BEST time!

One thing to think about with a campervan is that once you have set up camp, if you want to go for a drive around to tour the area, you have to pack everything up again, then re-set up when you get back.

Best of luck, I'm sure you'll love it!