I agree with what Rioja said, a lovely site, one of the best we've been to although I did find the female warden a little scatty :O)
From the site you can walk straight out to the lake. There are red squirrels around the site but in the summer, with the leaves on the trees, they spend more time in the canopy.
The drive from Keswick is narrow, especially once you've crossed the double humped single track bridge at Grange but nothing to worry about if driving carefully.
When on site and driving to Keswick turn right, it's a narrow road but the views are spectacular of Keswick and Derwent Water.
Another place for good views is to take the turning to Watendlath off the Keswick to Grange road and at the top theres a car park with magnifent views as far as Bassenthwaite Lake.