i agree with #2: its okay to say 'hey im only a shodan, im here to help with with basics and simple stuff'
A beginners experience with aikido usually is that it doesn't
"work" without strength, becayse they can't do the techniques correctly, and so the only times they have some kind of success against another struggling beginner is when they throw in some additional strength.
One way to approach this could be to forget "no strength" for now, and focus with them on "less effort" . Often you can show people how if they do technique more correctly it will cost them less effort. And that gets the beginners working in at least the right direction. Throw in a joke about how aikido is for lazy people and you're good to go.