My story begins on a blasted road, high in the Guardian mountains along the north edge of Whitehill. The air is punishingly cold up there. A lone cart rumbles its way along this road, jolting over the cracks and pockmarks left by the War of Three. Well, calling it a "cart" is hardly a fair description. It's more akin to a jail cell on wheels, made of thick, reinforced wood with two small windows that let in the cold but keep most of the light out. Two people sit on the outside of this heavy carriage. One, a grizzled old man with a thin grey beard, dressed in thick furs; the other, a young girl with a leather helmet and an oversized crossbow. She clutches the crossbow to her chest and closes her eyes against another wintry gust of mountain air. The oxen plod solemnly on, heedless of the cold, towing their dangerous cargo behind them. This isn't the actual opening to my story, but I'd like to know whether this is enough information, too much, not enough, or what details could be omitted or added without ruining it. How do you set the scene in the first part of a novel? How much scene needs to be set?