In reply to sheelba:
If the weather is good in the Alps, just keep going. Burgundy is a perfectly pleasant diversion, but really nothing special. I mean, if you were on your way from the south of England to Skye or Ben Nevis in good weather, you wouldn't bother stopping at Ilkley - would you?
If you want to crag, the granite valley cragging at both La Berarde and Ailfroide (the two main Ecrins centres) is stupendous. Much closer too are the limestone crags of the Durance valley. Finally, again much closer, is the Vercors - a tremendous area in its own right. But if you want to crag (albeit the routes are 8 pitches long) you could visit Presles, on the way to the Ecrins from Grenoble. A fantastic place.
You can drive to the Ecrins from Calais in a day quite easily.