In reply to efrance24234:
Stayed here a few years ago - can't remember prices, but it had plenty facilities for a longish stay.
http://campingsassdlacia.it/home/
Also camped at another less posh, less well-equipped site a few bends down the road that runs south from the Falzarego Pass. Will try to find its name for you.
Have camped in Cortina, but busy and pricey when we were there, and the town seems to have gone upmarket in recent years.
Dave