Bearing in mind it was seriously cold, our RV could not cope.
We had survived a week in England a couple of years ago at minus 12
with no problems and thought we would be OK.
We were wrong and no amount of pre planning would have made our RV suitable for that cold.
There was a nice Hymer next to us that had absolutely no issue at all
with the temperature. The owners said they spent a week there a couple
of years ago at minus 30 with no probs.
Having said that obviously some RVs are better than others !
We had snow chains ( which we did not use ) but the site owner was
not impressed saying only snow tyres were any use. I am not sure why but
he definately knew more about the subject than us .
Another issue was fitting a German gas bottle onto the extenda stay. I did not
go into too much detail on that one but it didn't look like a simple task as the
fittings diameters were totally different. There probably is an answer to that
one but it was TOO COLD to worry about.
The autogas which we bought high up in Germany which we use for
the domestic side worked but reluctantly.
We would have gone to a site lower down but on the way to Austria our car packed in
living and as the ski busses did not run from low down the valleys we cut our
loses and left................sadly
BUT AT LEAST WE TRIED
but I think I can live with that. 
Linear Mode
