There is no formal dress code - though dressing up in your semi-formal attire to watch the wedding could be really fun. Take a selfie and upload it for the bride and groom. Let them know you are there in spirit!
You can send questions to T.O. Bakken (Andras's mom) at theolenebakken@gmail.com.
The mailing address for Andras and Michael is: 320 N Warren Street, Apt 15 Helena, MT 59601