Went to Lydden last year - the tracks a lot like Brands indy circuit, possibly a mirror image of it, the surface is not that great in places.
There are no garages but powers available via the round outdoor connectors rather than normal plug sockets
Just a burger van for food and on the day I went there was no sign of any noise detectors.
There were a lot of crashes, (might just have been that day - although it was hot and sunny) and we missed a session as both the Ambulances had left the site.
Great fun - possibly better suited to smaller bikes - the fastest guy in the fast group was on what looked like a dirt bike with slicks on that had a 90mph top speed.
Cheers