I’m not sure what the connection is between going to Paris to complete your novel? Could you not complete your novel elsewhere/anywhere?
Morocco would be a more interesting experience for most Americans, more outside your comfort zone, which I always think is a good thing. However, these “pay to play” volunteering experiences don’t carry much cachet with admissions committees, IMO. Not saying it won’t be an enriching experience but I don’t think it carries a lot of weight.
As far as Paris, I doubt most colleges of Yale’s caliber are going to let you transfer those college credits.
What gives you confidence that legitimate publishing houses will be interested in your novel? Getting published is no easy endeavor these days even for previously published authors. It’s a tough business.