Best photos to be had from either
1. Britten's chicane - a long walk over the footbridge but well worth it, or you can drive into the Knickerbrook entrance but still a fair walk. You can drive in there and then still get back into the main entrance if you wish.

or:
2. Outfield at Lodge corner, with the Lodge in the background. For this you'll need to get across the track at Lodge corner between races, and then you're stranded until the end of that session.

or:
3. Outfield at Knickerbrook chicane - there's a proper vantage point there...

or:
4. Infield from the bottom of Deer Leap, a nice shot of them coming around Lodge corner....
