I visited Hangar 7 in 2010 and it's a pretty posh place.
Unless things have changed since I visited, I think you'd need to make some sort of special arrangement beforehand to visit Hangar 8 as I asked and was told quite bluntly that Hangar 8 did not host visitors.
At the time I visited, the Hangar 7 floor was taken up by some F1 and rally cars along with the B-25 Mitchell (the high point of the visit for me), Stearman, Cessna Caravan, Huey Cobra and BO-105. Four Alpha Jets were sitting on the apron between Hangars 7 and 8.
Here's a few pics I took during my visit:
Looking longingly across the apron to Hangar 8...