We are taking photos with our professional photographer before our sunset ceremony. Since our wedding is very small and there's no bridal party, I thought it would be nice to invite guests who are interested in getting their photos done to come as well (while it's still daylight). However, I know there are several guests (a bunch of the men), who would probably rather die so I'd like to add it as an event for those who are interested only but I don't know how to designate that it's optional.
Do I just put (optional) next to the event? Or is there a better way.