We've spent a couple of weekends recently camping in some fairly crisp temperatures. The dogs have doonas which I form into nests and they wear coats to bed - in my tent one on each side of me - so I think they are warm enough. But I've been looking online for adventure-dog gear.
The camo sleeping-bag is available from ForDogs They also have dog tents and folding food tables.
For the serious dog hiker Tails by the Bay have the Leash Beaner, a carabiner clip-on for your leash that has a built in compass, stop watch, watch, and mini flashlight.