We're watching the same stages too and like you I am probably going to head to Ducey to watch the TT, as there is a right/left hander in the centre, so will be going slower.
I was actually thinking of watching en-route a couple of K outside Ducey as there's a short incline (5% gradient or so) but it's in the middle of nowhere and so no facilities nearby.
I think the TT starts about 9 in the morning and goes on all day, so all riders must be at 3 minute intervals?.