Should we fill out FAFSA and/or CSS if we are only seeking true merit aid?

Some schools explicitly state that if you don’t apply for need based aid, you can’t come back and apply for it in a future year. Not sure if they would hold to it, but my thought is that you never know what life will throw at your (I am a single parent, and know that a disabling illness or accident, or unexpected downturn in my business could put me into FA territory even if we aren’t there at the moment). I’d fill it out. Even though he isn’t officially applying, you can at least say that you filled out the forms for them if it comes back around in the future.