Lovely place. Dogs not allowed, it gets quite hot during the day but can get cold at night. There's a 4WD park at the southern foot about 8km north of Tooraweenah called "Ados", we held the first Navara Muster there. Peter (owner) charges about $9 per night for camping, there's two flushing toilets but the showers were mediocre at best (he might have changed that!). You COULD take dogs to Ados but they often lay fox baits around and being a working farm, he has his own dogs too and they might not get along.
Coonabarabran is a nice enough town with most facilities, Siding Springs is west of the town in the heights of the range and is worth visiting (the museum might not be worth the entry fee, but you could consider that a donation). The telescope itself is worth seeing.
Watch out for brown and black snakes.