Hi Jacques,

You'll be spoilt for choice for good roads in the Pyreneese most of which will be well suited to the Tenere. I prefer them to the Alps which are too busy.
There's some great roads to the south in Spain and also to the west of Perpignon around the wine regions of Fitou. Andora is great and there's plenty of tax free bike shops there so if you need any spares or tyres head there. I can't comment on camping as I've opted for hotels but again I believe there to be lots to choose from.
How are you planning to get there? It's a long ride from Calais and you'll clock up the miles and square off your tyres if you're hoping to do it all in a week. The ferries to Northern Spain are a good option worth looking into.
Kev