Semi-formal attire is preferred, if you can make denim fit that definition we'll take it.
Hard to say, but it could be on the cooler side. We will be indoors after the sun goes down, but warmer clothes could be wise.
Yes, part of the wedding is outside. The ceremony and dinner will be outdoors before the sun goes down. Once the sun is down we will be in a heated indoor area.
Yes.
No, there are no rideshare services available in Taos.
Yes, if you ride your horse you will receive the equestrian discount.