So I fiddled around with the code provided by @Leylou and I could not get it to work. I decided to go back to my original code and did a BUNCH of reading!

In my original script this line:

let newEvent = busDriverCalendar.createEvent(tripData[i][28], tripData[i][34], tripData[i][35], { description: tripData[i][29], location: tripData[i][32] });

needed to be changed like this:

let newEvent = busDriverCalendar.createEvent(tripData[i][28], tripData[i][34], tripData[i][35],  {description: tripData[i][29], guests: tripData[i][1], location: tripData[i][32]});

If you read through my original script you will see that three different calendars are used. In the same line for each calendar I changed it to include guests: tripData[i][1],

It works perfectly, adding the person who submitted the form without sending notification or updates.

I want to thank @Leylou for the work you did on the answer you provided. Ultimately it was not useful to me but it might be useful to someone else. That answer did work in my test account, I just could not get it to work in the main account all this google app script work is for.