Personally I don’t think it would be. When i asked that quesrion, I was told if they put you with another group, you can request to just go by yourself. You’d have to wait a bit, but they’ll let you go in that way.
I’m not sure if two people though could find all the clues. 6-7 people would be the ideal size I would think. We had 9 and at times it was pandemonium. We finished it with 11 minutes left though and it had a 30% success rate.

Cool stuff, you’ll like it.
BKB