our setup
using poles with the tarp means we have the option of creating an air gap on the hot days which drops the temp inside considerably or cinch the tarp down for wind and rain.
We also have been able to extend the shade area beyond the end of the annexe
The tarp itself is a 6.1 x 5.9, about 12 years old, very solid with heavily reinforced eyelets.
In mild weather we would use the minimum amount of poles and ropes but if it gets blowy we add more poles and ropes to take the strain. Has stood up to plenty of southeasterly busters on both Straddie and Fraser.
I'd recommend a solid tarp with eyelets not D rings, they're hard to find these days, but worth it even if you get one made.
For anything more than an overnight we now always go for the tarp, it's worth the effort.
We found the best thing To stop poles supporting the CT canvas from gouging at the tarp is a Yo Yo cut in half with a hole in the inside part to sit on the tip (of the poles underneath) It's a very neat solution and better than those yellow things the camping shops sell