Ditch the leash. A gentle dog like a doodle, who is reasonably well-trained, does not need one. Leashes are a plague on both man and beast. You’ll run into the odd hiker who makes a scene, despite the fact that you’ll be in their rear view mirror in 30 seconds, and planning a trip to avoid such people is a good way to get off the beaten tracks.
I like the look of Groundbird Gear’s Turtle Top Quilt – I think the design offers the best flexibility for the dog to adjust their insulation depending on conditions – but the variation meant for shoulder seasons is gonna get soaked sooner or later. I like Nunatak’s idea of using silnylon for the dog-side fabric. That seems like the only way to make down work for a product like this. Sooner or later the dog is going to enter the tent very damp or wet, will need their blankie, and will soak the down. The other option would be to use a synthetic fill like Climashield, which in a product of this size will not result in a big weight penalty.
We use a short Prolite pad unless the ground is quite warm. R around 3; thick enough to provide some comfort, and claw-proof fabric. I really wish someone would make a dog-size pad, like 40×30 inches for a 60 pound dog. The only way to get something like that would be to cut down a double-wide pad. In summer, a dog might prefer to sleep on the ground, but I hear of people bringing thinlights for their dogs when it’s freezing at night and shake my head. A long coat might provide enough insulation from the air, but does nothing when compressed against the ground. A dog can’t fluff forest duff to make a “pad” like a wolf does, so we have to provide them.
In general, I feel that our dog does not get enough, or good enough, sleep while backpacking. Upon return home he’s more exhausted than I ever see him otherwise. The amount of hiking we do is rarely more, though, than many days when we sleep at home, so I don’t think it’s the exertion. There could be other variables – excitement, stress, cognitive energy expenditures, etc. – but I generally get the feeling that he gets sleep deprived when backpacking. So anything that improves sleep is worth considering, in my opinion.