Whatever you do, bring layers. The Oregon Coast keeps it between 60 and 80 degrees depending on time of day. It might be misty, it might be breezy, and generally everyone should plan for potential chill. Beyond that - no real dress code. Come comfy.
The contingency plan is porch wedding, tent reception. We have a backup plan.
Yes please. We will be bringing ours and we'd love for him to have as many of his cousins and friends with him since he's a big part of our celebration as well.