Having never been to a beach wedding, what does one wear? Currently the event is tentatively scheduled for evening (sunset), a smaller gathering of family and friends. I need to know what proper attire is for such? I am looking online and am having issues for my DH (anything besides linen anything?), myself - would it be ok to wear a fuller leg sleeveless jumpsuit/pant that almost appears skirt like on the bottom? I think for my kids I have it figured out. I have time to continue the weight loss, so maybe by then something fuller in the leg would look just fine or maybe by then I'll be in love with my arms.
Any ideas would be great.

. I was thinking flat sandals to keep my foot on one level and ease of not sinking further in the sand (i.e. snowshoes!). I have some time to plan and weight to continue to loose and fabric to find - as I tend to sew for myself. Thank you for your ideas!