Help with journey along the E533/B177 Zirlerberg,

Hi,

My wife and i are looking to travel between Tennsee, Germany near Krun to Wattens, Austria near Innsbruck.  The obvious route would be along the E533/B177 but that takes you down the Zirlerberg.  We have checked this route out on Viamitchelin and Google Maps but are not sure about the caravan as there is a very long steep downward slop with hairpin bends.

Has anyone travelled on this route before with a caravan?  Any help and assistance would be gratefully received.

Many thanks

Lamplighter