We were married in the paddock of our farm in a marquee. I had the ress coe for the ceremony as semi-formal and then I noted on the invite that as it was in the padock and it gets cold that ppl could feel free to bring a change of clothes or get changed before the ceremony. Most ppl just put on slacks and nice tops or some even stayed in there formal gear. I didnt have a prob with guys or girls wearing denim. I just wanted pl to be comfy!

Doesnt really help you out much! I would say neat casual or semi formal - or call the bride or groom and ask!

HTH
Kate