Everytime I've camped in the lakes I always make sure I spend a night at the campsite near to Castlerigg, then an early night and up with the dawn chorus to spend 2 hours or more alone at the circle with the morning sun and mist.
Whilst the "show" sites suffer in terms of numbers, many many more receive less than a visitor a week and suffer neglect and deliberate damage which goes unpunished as not enough people care for authorities to act.
Personally I think the more people care about visiting any prehistory the better as it raises the profile of the whole.