Great report so far. I'm looking forward to part 2.
My next visit since 2 years is scheduled for August this year. I'm really looking forward to it.
I guess best way to ride Crush is to head to it at opening time.
^
After X-mas holidays till end March, on weekdays and not in 'our' or neighbouring countries' February holidays, you should be fine.
Of course it can be unpleasantly cold in those months.