The address for the wedding can be found on your invitation that you will receive by post.
Travelling by car
If you are planning on travelling to the wedding by car there is ample parking available at the venue.
Travelling by train
The best way that I can find to get to the venue by train is to catch a train to Oxenholme station and then change on to the train running to Windermere. From there catch the 555 bus to Brockhole Visitor Centre and then its a 15 minute walk to the venue.
Please also be aware the train prices are heavily affected by Lake District tourist seasons so please try to book in advance.