Good choice, we're heading up there for a couple of weeks on the 9th Sept - the prices seem to drop dramatically in that week as all the schoolkids are back at school around then, but the drawback is that because its an NP they remain a bit steep - Last time I B&B'd there with a car I looked for cheaper prices in places just outside the park say in Penrith or Kendal as they were about 20% better value. Maybe try a Youth Hostel?