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With the increased scrutiny of all visas right now, I would avoid any ceremony which could be subjectively interpreted as a wedding prior to the official marriage inside the US. "Too married for a K-1" is a real thing. Realistically, you could travel back to France for a celebration 3 to 6 months (possibly a little longer) after applying for advance parole (I-131) and Adjustment of Status. It would be terrible to get to the interview stage before finding out. Personally, I wouldn't take the risk.
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Of course, another option is the spousal visa.