Alpin Camp at Seefeld in Tirol is a must to visit.
Page 145 of the 2011 edition of “Caravan Europe 2” published by The Caravan Club explains all. The site is on the edge of Seefeld on the road towards Leutasch. If you are unfamiliar with Austria, the area is on the road from Munich and just over the border into Austria west of Innsbruck.
As for the detail, WiFi is freely available, the electrics are spot on with no reverse polarity so everything works well and a strong mobi signal as well.
But, of course, it is the location that does it.