Postscript to that, I've just noticed that you're in Oz; the numbers I've used are for the UK.
I'd guess that statistically gliding becomes safer for you - there's far more empty airspace to play in. I've no feel for Australian road traffic, but suspect that you probably have more hostile wildlife jumping out at you than we do.
I remember an RAAF friend saying some very uncomplimentary things about Kangaroos on runways mind you.
G