Make sure you have good brakes. Going into the Carousell on your first ever lap round there without being able to slow down is the single scariest thing in the world.
It's definatley worth going, even if you just go for the spectating aspect its worth a week out there. The local town Adaneau (sp?) is also worth a look, beer warehouse for one reason. I fair enjoyed my time over there, such a good week.
We stayed at http://www.camping-am-nuerburgring.de/ in Mullenbach, which is about a mile or so away from the ring. Only problem being is you can hear the DTM cars going round the track at 7 in the morning.
Whilst everybodys whoring pictures of themselves on the ring...
All the horrors stories you hear about the ring, and the rediculous costs of repairs etc, just use your noggin. The only massive crash we had the year I went was somebody ditching it into the barrier at about 90. He was trying to beat his previous 9.48 or something, he was only on his 9/10th lap.
I would 100% have no question about going back thou, walking around the carpark was one of the coolest things in the world, There was a fully caged zonda, full CF setup inside on slicks with some CF panels, the driver was talking to a guy who had just climbed out of a 1991 polo gt. Such a great place, no snobbery or anything, everybodies there for the same reason which makes for a shit hot atmosphere!