Touring Question For France

I took a euro 5 bike there last year and went through a similar issue as you getting vehicle not eligible or something similar. I can't remember the exact solution, but there was something about euro5 or emissions on the V5 that I just left as their default rather than entering in the info from the V5. Hey presto it went through and I got the crit1 purple certificate.
Sorry I can't be more exact about how to do it.
Enjoy the planning.

 

Euro 5 is ok. The Crit Air restriction is only for big cities like Paris, Lyon, etc. So far you don't go there you're ok, and even if you enter on of those big "wannabe green" city, there is a tolerance for tourists.
Guedelon is really interesting. Good choice.
The area around is the the best place to stay. Where do you plan to go then? Below Guedelon, you have beautiful placesin Bourgogne. (and no crit air restriction)

 

@MoreT: As Hubaxe wrote before, actually there is a tolerance for tourists in the big cities. But be aware! There is no fun of riding a bike in those cities. Lots of traffic, interesting interpretations of traffic rules and a big problem is to find a legal way to park your bike there. Search for an accomodation outside and use public transports for the big cities. Anywhere else in France you will have no problems!

 

We are going to a place near Angers, where they race pre 1930's cars, trikes and motorcycles .
Glad there's no pollution control there!