Just did it last night (feels weird saying that; I just got back home this afternoon and my sleep schedule has been kind of wild the last few days). They seated me by myself, but it actually looked like they were sending most people to seat themselves where they pleased. I got special treatment because I'd marked an corn sensitivity concern on my reservation, so they had to keep closer track of where I was to be able to send a CM to talk to me. Really nicely handled, btw; they made up a special plate for me and then the guy was really helpful in terms of going through the book with me so I could judge for myself whether there was anything else on the general buffet I could handle eating.
I felt a little awkward at first, but honestly none of the other guests even seemed to notice I was there. I even went back and forth between the Terrace and the viewing area since there was a break between the projection show and the fireworks, and everyone was too wrapped up in their own business to bother about me. I had misgivings before I went, but I was really glad I'd reserved it because the crowds were pretty intense and it took alllll the stress out of finding a good spot for the shows.