In reply to fibonacci moose:
If it's any help I went into Leroy Merlin in Grenoble on Saturday and the toilets were open as normal (previously all stores had closed them) - can't see why campsites would be any different.
We've been out of lockdown for longer than the UK and made good progress although it looks like the R0 number might be creeping up again in some places.
As of today it's obligatory to wear a face mask in any enclosed public space though.