Save you a headache? Easy…don’t make it into one in the first place!
You say this is “way outside your scope.” What is your scope? Figure out what you normally do and just do that.
I know that sounds flip but I’m being serious. Your mistake here is thinking that you need to create something out of photos and effects. A raw wedding tape isn’t something that needs to be built up. It’s a big hunk of granite that needs to be chisled down to a statue. Your job here is to cut stuff OUT, not add more junk. This is really editing at its purest.
Remember this; unlike any other job you do, the client is probably fine with the raw footage as it is. It’s THEIR wedding…they’ll be happy just seeing it at all, even if it is dull to any other human being. It’s not your job to change it. Rather, you should be focused on improving the viewing experience by making it shorter and cleaner.
My wedding clients hire me specifically because I DON’T do any of that gooey, fuzzy effect stuff. I worked out a very clean style that fits the way I like to work on any project, wedding or not. People hire me because they want to see themselves, not some silly after-effect saturated thing.
Of course, you’re in the unfortunate position of not having chosen these clients. So you don’t know what they want. But I would consider the very real posibility that they don’t want any of that stuff you’re worried about.
You should think about what your strenghts are as an editor and have a short conversation with the bride to make sure that she’ll be happy with that. Sell her on your strengths just like you’d sell any other client. Surely this has to be easier than the last medical-industrial video you did that required a million technical facts?
You seem to have some negative preconceived notions of what a wedding video should be. My main point here is that you don’t have to make THAT video. If you try to make a “wedding video” you’ll drive yourself crazy. Just make a “video” like any other and don’t worry that it doesn’t fit some standard mold.