Buy a tripod and dish from EBay and take your box from home, its easier if you buy a cheap satfinder and compass.
I have used a standard 48cm dish all over Britian and it works ok. It normally takes me about 10 min to set mine up. I dont even bother with my omnistat
Dont tell Sky, you don,t need your telephone line connected provided you have had Sky for more than 12 months.
I have also used a 60cm dish for use in Spain.
The following websites give you all the information you require
www.satelliteforcaravans.co.uk
www.brymar.co.uk
www.satcure.co.uk
Steve