Ironically, Houx Annexe was the first site I ever stayed on at Le Mans in 1998. Camped at the very top by the entrance to Houx. The next time I went I was camping on Houx, wanted Electrics for the week. Spent about 3 years there, during this time I made lots of new friends on Maison Blanche so moved over there.
I would like to set up a permenant base on a campsite but this looks more and more unlikley as HA is set to close and MB looks to be getting smaller every year.
Personally I am rather happy about being back on Houx Annexe as the traffic outside is better, closer to the Stella Bar, Closer to the better viewing spots of the track.
The biggest downside is it is such a long way from lots of other CA campers.