Thanks @flexxaeon, we definitely don't want to go the app route because... most guests won't have any phone capable of running an app. The hashtag route is a go

Thanks @flexxaeon, we definitely don't want to go the app route because... most guests won't have any phone capable of running an app. The hashtag route is a good idea, but 50% of the guests don't share photos any way at present (save attaching the occasional one or two to email). I'll keep thinking!