How best to simplify Zoom

My high school class is planning a 60th reunion for the Fall of 2027. Some class members can no longer travel because of age-related issues. We would like to have a hybrid event with most attendees physically present, but some (I estimate 6  - 12) attending virtually using Zoom. I have been assigned to responsibility to provide that access. Since this is a one-time event, and most of the target audience does not use Zoom, the absolute top priority is simplicity of access, which will no doubt be via a mix of computer and phone devices. My second concern is how to structure and present the virtual part of the event so as to provide maximum  benefit to the virtual participants. I attended a Zoom training event today hoping to get some insight into those goals, but the results were somewhat disappointing, There was a lot of time spent on the bells and whistles available with Zoom, but I really need to go in the opposite direction from that; it also seemed to be directed mostly toward users who will make recurring use of Zoom (which is entirely understandable). Here are some specific questions and issues I need to research:

1. How can I provide the absolutely simplest method for remote attendees to log into our event from computers and/or phones using only a url (no installed client app)
2. My initial intention is to have a camera with a wide view of the live event and use that for the “host” Zoom image - can that be done?
3. In addition to that camera, there will be a large (55” or more) LCD TV at the event in a central location to display the gallery of remote attendees, the camera mentioned above, and a microphone and speaker will also be at that location.
4. Our reunions are not structured; there will be very little in that way of planned activities, most people spend the night mingling and chatting. I don’t think that would provide such a great experience for someone who is remote, so my plan is to dedicate 45 minutes or possibly a bit longer for all of the local attendees to gather around the large screen TV/camera/microphone location to interact with the remote attendees. I’m guessing that it would be best to give each remote attendee the “floor” one at a time to interact with the local attendees acting as a host group, but I’m not certain about that. 
5. I am also not certain about whether the remote attendees would be better off seeing the gallery of other remote people, with the wide video of the local site as just one more image pane in that gallery, or whether it would be better for the entire gallery only seen on the TV at the local end, with the remotes seeing just the local video, not each other. While it would be nice to facilitate the remote people to interact with each other, that goal is secondary to each one interacting with the local group, and I am mindful of the limited screen size and resolution for many mobile devices.

Well, that should be enough for now 😎 However, if you have any other thoughts related to conducting this kind of hybrid event using Zoom, I would certainly appreciate you mentioning them. Thank you!!!