Well; judging by the silence that normally follows postings to do with Internet access I conclude that us carvanners (in general) are a pretty staid bunch and whilst we will get excited over having access to our daily dose of TV, we tend to appear disapproving at the notion of Internet access whilst on site. Don't worry it WILL change. Meanwhile, I am in your shoes and wonder how I will be able to get online when in the Lake District later this month.
G3, certainly; either on your mobile phone or as an adapter for your laptop, linking directly into (say) vodafone; it's expensive but it works. However, good old GPRS is still around and, apart from slower data transfer speeds is still capable of giving access to the Internet.
Personally, and if I don't manage to get my hands on a PC with Internet connection at our caravan site (the horror of such a thought); I shall use my small Nokia mobile phone which can easily connect to my Yahoo email account and from which I can read my emails; composing outward emails is another issue though !!!
I note that many caravan sites in Europe are now offering Wi-Fi access points; and with the city of Norwich going totally WiFi and Milton Keynes on a WiMax roll-out, it will have to appear on caravan sites within (say) the next 12 months. Here's hoping !!
John