sky do not have a problem with you taking your decoder to your holiday home.
try the website...
How do I set up my HolidayHome for Digital? Published 26/06/2006 06.43 PM | Updated 27/05/2010 11.48 AM How do I set up my HolidayHome for Digital?
There are two options in regards to setting up SKY at your holidayhome.
You can install a dish at your holidayhome for a one off charge of $399. This allows you to move your primary decoder between the two addresses and pay only one monthly subscription fee. SKY will service your decoder at either address.
obviously if you have a dish there then its not a problem.