Anxiety about going to a cabin

So I’m getting married in a few months and we paid to have a two day stay in a cabin that belongs to the venue owners we’re getting married at. It’ll be just us two and our two very young children. Same for our wedding we’re basically eloping. For some reason I keep having this intense fear that when we’re staying out there in those woods by ourselves nobody near by that somebody is going to try and kill us. Idk if it’s because we never did this type of thing we’re home most the time. It’s suppose to be an amazing time for us but I keep having this odd feeling inside me and I don’t know how to get it out. We can’t not go either because it’s paid for already! Is this just true anxiety or a gut feeling that something bad is going to happen there and to listen to it?