Congrats on your (and my) 4000th post! I have seen some Chinese wisterias in Fairmount Park up in the trees. Getting it trained into a tree form like that pic is amazing! That is a huge tarp your wife made. That should hopefully keep the buds protected.
Right now at post time, my temp here is barely 35 (34.5). I know it will drop just before and around sunrise (which is a little under 30 minutes from now), when normal diurnal temperature changes are happening, so have been watching closely. Dp is 19 so don't expect frost.