I think you might be overreacting just a tad bit. You have the right to be upset because she didn't respond to you when you first told her you didn't want the cottage, but I don't think it is worth growing a brain tumor over. I do agree that it sucks to loose complete privacy, but you will be so busy on your wedding day and the day will go by so fast that you probably won't even notice them. Maybe ask the manager to leave a note that asks them to be respectful of the wedding reception? Or if you meet them ahead of time and you like them, invite them to join the reception after the dinner is served and the dancing starts? It's your wedding, if you keep focusing on the bad then you will only have bad memories of your special day.