If you choose to drive to the church for the ceremony, there is a free lot across the street from the church at 19th and Welton. The church is also walkable from the hotel/reception, and because of this, transportation will not be provided.
The Brown Palace and Holiday Inn (listed on the travel page) are connected via bridge, so either option is great.
Our cocktail hour and reception will be adults only. That said, your kids are welcome at the Ceremony at Holy Ghost Church!