I will have a traveling party of 6 or 7 on Delta MCO to SLC in about 10 months. Wife and I will be in first and the rest in coach either paid or on miles or a mix.

Is there a way to do this on the site so we are all on the same itinerary? I specifically ask for the free checked bag benifet of my Delta Plat Amex or Delta Gold B Amex if it matters.

I have not figured out a way to buy tickets with people traveling in different cabins on the web site.. An add to cart feature would be nice.

One thing I considered is outside of this is getting an extra seat in coach for my parents so they have an empty middle seat between them. If I bought that using my skymiles number in coach with my last name and extraseat for the first name. Would that mean I and them are on the same itinerary so they get free checked bags? Any issues with me having a seat in both cabins?

Is there a better way to accomplish it? I assume calling and buying tickets with a person costs more. Same if I just went to the local airport ticket counter.