Oo! I like this experiment. Another fanfic message board I was part of years ago did it this way.
This was fun. It reminds me of the Road to Rebirth Lois and Clark comics, in which they are stranded in an alternate universe and Clark grows a beard and they go by different names and try to stay under the radar.
Interesting to see gow that might play out in L&C universe, especially with our Clark discovering them. Hope you write a follow up to this. I'd love to hear their explaination.