Hi guys, thanks so much for the reply.
I'm glad to know that a SUV isn't required, and I've booked an Audi A4 Quattro so that should ease my mind driving in winter a bit, since I've never had to drive in snow/winter in Australia!
That itinerary is also very helpful, and looks like my rough plan is to go from LV Strip direct to Bryce Canyon and stay overnight there. Then the next day look at Zion and then Valley of Fire before heading home.
I noticed you have 13 points of interest listed under Bryce Canyon, would you be kind enough to share those in case I've missed any?
Thanks once again!