Relax there Mercman, you'd think you were the one getting married!! We have public liability insurance, just doesn't happen to be were the cars are parked!!
I hear what you are saying but do I have to get insurance also for the bit of road they cross from the field to our house. I haven't really thought about it to be honest. All I wanted to figure out was if it was possible to get people from the house to the field by floodlight, mud free, not if they would actually survive the walk injury free. I shall look into though, goddamn those gut feelings. Anyway, thanks to all the replies, I think we have sorted this one out in a way. Most helpful.