Easter Tour

[fensterheim123]

Hi I was wondering if anyone can help?
I am planning a tour from London to the Pyrenees in Easter (Late March-Mid April). I was planning on doing something like the itineary below and I would be camping!
Herne Hill-Dunkerque 80
2. Dunkerque-St Niklaas 85
3. St Niklaas-Dessel 85
4. Dessel-Verviers 85
5. Verviers-Idar Oberstein 120
6. Idar Oberstein-Hagueanau 85
7. Hagueanau-Freiburg 80
8. Freiburg-Lucerne 60
9. Lucerne-Saanen 80
10. Saanen-Chamonix Mt Blanc 80
11. Chamonix-Les montier les bains 95
12. Les Montier Les Bains-Gap 50
13. Gap-Orange 85
14.Orange-Clarnon L’Plage 80
15. Clarnon L’Plage- Carcassone 90
15. Carcassone-Saint Girons 80
16.Saint girons- Lortet 50

Has anyone done a similar route before?
Will all the passes be open this early in the year?