Garages should be OK, you might end up at the far end, but hey your still in a garage.
For me there's only 2 places that leap out at you, one being Redgate and the other being Coppice (blind entry/tip in) the esses aren't great but you can see them from miles away.
I prefer the national circuit over the GP but you won't be dissapointed.
As for camping I'm sure you can just outside the circuit, but you'd better check with the TDO, as for Hottrax I've never had an issue with them to be honest.
If you like fast flowing tracks you're at the right place, one of my faves, craner is awesome
