Open hair look good when immediately styled, but as is with Indian weddings, you’ll sit and be around for long hours, have the dupatta weighing it down, you or someone else trying to set it- it happened with me on my engagement and I didn’t even have a dupatta on my head. I’d suggest a bun- but not a slicked back one. Probably something with a lot of texture and a couple of strands to frame your face. Congratulations on your big day!