I went to magic weekend in 2015 up in Newcastle. It was great with all the supporters coming together for a celebration of rugby league. I would normally get behimd Leeds but met a group of Castleford fans who were a great laugh so got behind them v Wakefield.
What makes it such a success however is the fact that it's a 2 hour train from Leeds to Newcastle.
How long would it take by train to get from Sydney to Brisbane?
Sydney to Brisbane by train takes a bit over 14 hours. There is only 1 direct train service from Sydney to Brisbane per day (and it arrives in Brisbane just prior to 5.00 am). Cost ranges from $130 (economy) to $271 (sleeper) for a one way ticket for an adult.
Travelling by air will be slightly cheaper, but you are still looking at a couple of hundred dollars per person round trip if you book early enough.
Obviously the cost will be higher and trip longer for those travelling from places like Canberra or Melbourne.
Driving from Sydney to Brisbane? You'd be looking at 14-16 hours as some of the North Coast roads are amongst the worst in the country, with it being 1 lane each way in many places.
I won't go into accommodation costs as they can vary from anywhere as $50/day to upwards of $400/day depending on where you book. Mind you that is often per room as opposed to per person.
Hence you will only get people who are reasonably well off being able to afford to travel for this event from those who are non-Brisbane based season ticket holders. Hence if Queenslanders don't turn out in numbers for the non-Qld based teams, it will flop big time as you just won't get as many people travelling for it as you might think.