Is AUTHOR wrong in the post ? POST : A friend and I have birthdays in January.  Because we're in our thirties, we have made plans to do a large, combined, party with a lot of our mutual friends.  The plan is to spend two days in an Airbnb in a mountain resort town two hours outside of our town.  Not sure if this detail is pertinent or not, but I booked and paid for the Airbnb.  The idea is to collect equal shares of the cost when we're at the house.  

Here's the dilemma: I'm having doubts about going.  Here are the reasons.  

1. Of the four couples whom are attending, three of them are on some type of no-alcohol program for the month of January.  One entire couple is doing a 'dry January' program wherein they don't drink alcohol for the month.  They won't make an exception for the trip.  However, come February 1st they go hard with a huge party.   Another couple is six months pregnant, and the husband is doing the same 'dry January' thing.  Finally, my birthday co-conspirator is training for a 50 mile run later in January.  He's on a strict diet and isn't consuming alcohol.  That leaves me and my wife.  Like I said, I'd have fun and enjoy myself, but this scenario has happened in the past with all of these friends just watching me drink and eat like a glutton (it's my birthday!).  It's not nearly as fun as it sounds.  Everyone usually ends up going to bed around 10:00pm.  
2. The whole trip will be around $400-$500 for each couple.  That seems ridiculous to me for the amount of projected fun to be had.  We all live in the same town, see each other frequently, and could easily make another plan that would be less expensive, or even reschedule it to the spring or summer, which I think would be more fun.  
3. Finally, during the trip, we would miss my daughter's choir singing the national anthem at our local hockey team.  We didn't know this until after the trip was booked.  

Would I be the asshole if I cancelled the trip?  I'm going to speak with my buddy for whom this is a joint party, but I'm 95% going to cancel the trip and make other plans.  If the other couples end up going to the cabin, that's perfectly fine and I won't be bent out of shape.  They'll be able to rebook the house with one of their accounts.  It's just that I don't want to celebrate this way.  I'd rather do something else or do something low key with my kids.  I'll be turning 31, so it's not like this is a landmark or important day in any way.  My wife thinks I'll be a total asshole if I cancel this, but I don't see it at all.  