There was tons of seating, so I dont see any issues keeping a table. This was the most laid back addon party we have ever done. I would do it solo in a heartbeat.
The woman standing next to us at the parade last night did both. I didn't press for details, but she said it worked out perfectly for her.
As I said above, the woman next to us at the parade did both and loved it. However, unless you really LOVE desserts you would probably be okay just doing Tony's. You can get an amazing fireworks spot right before they start. We got a spot almost dead center of the hub 10 minutes before the fireworks started. It was an even better spot than the plaza garden view and we had plenty of room. Here is a picture of my view. This is just a cell phone pic, no super zoom lens or anything.