Did the AB 2 months ago with camper. Wouldn't dream of taking the top Ender purely due to the narrow sections of track. Your van will really cop a hiding along sides, awnings etc. really rough road in patches ( other parts fine) but too narrow in parts ( mainly creek country) for van. Just my 2 bobs worth.
I would seriously think about a slight diversion to Brendale.....which in the overall scheme of things isn't too far out of the way
Enjoy your 'lap'.....?