Well, I already said I would go so I can't back out now, but it was mainly because this person is constantly asking me to come out to his house. Thing is, he lives waaaaayyyy out in the sticks so it's quite a trip to get there, plus he has three dogs that are threatening to me (Sorry I forgot to clarify my friend is a "he" by the way), so he really should realize most people would not find the offer attractive. And of course, he doesn't realize this.
Now I assume he's putting the dogs up for the time he's having the party, since that's what he's done in the past. I kind of felt bad for him because I didn't see that anyone else he invited is going. In any case, my reasoning for saying yes at the time was because I have been asked to come see him so many times and have always refused that I felt like I should just suck it up this time.