In reply to RJP:
> Has anyone found going a bit above this a limitation?
You'll pay a bit more on tolls in France as a class 2 vehicle (or over 2.1m in Spain I think), maybe more on the ferry, and access to some car parks will be a problem. Not sure about Font camping, but plenty of people around in high top vans, so I'm pretty sure it won't be an issue.
I've got a low roof Transit, but the vent takes it just over 2m. Sometimes I get class 1 on the tolls in France, sometimes class 2. I put it on the ferry as 2m and not had a problem.
Post edited at 22:37