That looks nice Dave.
I've been through that area a fair few times.
We used to do a Pyrenees thing. I think I went down there every year from 96 to 2006 (edit missed 2005).
We would use a hotel in the mountains as a base and ride out from there everyday. As you know the roads are epic up there.
a lot of times we timed it to match the Catalan GP and popped down to Montmelo on the Sunday.
Most years we did the Portsmouth / bilbao ferry. Of the times we rode down through france from Le Harve I can say it was pretty much dominated by the weather. I can't remember the year, but heavy rained most of the way really pissed me off. Saying that the best "going somewhere" ride of my life was Le Havre to our Spanish mountain base. 2 and a bit days, great weather and no motorway. In fact we were only on dual carriageway (french a road) for 50K.