Double Decker Conversion - which camp sites?

Hi all, 

I am currently weighing up my options relating to converting a double decker bus into a motor home, similar to this: http://biggreenbus.co.uk

I've been doing quite a lot of research and my current area is to find out whether camp sites or caravan sites would take such a vehicle? 

Would such a vehicle be frowned upon or not allowed, even though it will in effect be a caravan? 

My wife and I both had parents who had caravans whilst we were kids in the 80s and 90s (primarily in York). We now have children of our own but fancy doing something a little different, hence the bus. 

Any advice gratefully received!

Best regards

Paul