Broadband in the caravan

I have 2 questions:
1. Does anyone use mobile broadband in a caravan (Can you get a good reception)?
2. The site I am on has its own chargeable wireless service will this interfear with my vodafone service through a dongle?

[goetian]

No the the sites own wifi wont interfere with any dongle you have and you can use mobile broadband anywhere that you can get a signal so shouldnt be a problem in a caravan.