This is not really a great option either, but I think I'm planning on going to the garden early and putting DD on my shoulders and letting her watch from there. I did this last year with DS. You're certainly off Main Street and it's not ideal, but up on my shoulders the view is reasonable and there are no issues blocking others (unless a bunch of people have the same idea, which isn't likely). Not great for my back though.
I just hate waiting around for a parade and I'm also not always certain my kids will make it to parade #2, so this was a make-shift strategy that kind of worked last year, so may try it again.
New to board but got a lot of great information from everyone that helped a lot for my trip last week. So wanted to share my experience with dessert party with terrace seating at 8/28 night. I too was going back and forth in my mind about whether to do first or second parade. I had pretty much convinced myself that would do second parade -- IF my 7 year old DD could make it -- so we could have plenty of time to enjoy the desserts. But things were much more smooth than I thought.
Arrived at party around 8:45, was shown to table next to railing. (I have no idea when people were let in, there were about a third of the tables filled at that time). Able to eat one plate (started with the cheese/crackers) and was ready to stay until after fireworks when a CM came by very close to the parade start and asked if we wanted to go to the parade. I was not expecting this as an option since we had reserved after the magic date. So we jumped up and were escorted over through the bypass to the flagpole area where we watched parade with plenty of room. The CM then escorted us back to the party (they were also escorting those with garden viewing). Once back I felt we had plenty of time to enjoy more desserts and watch fireworks. I don't know if it was a fluke in regard to offering the parade viewing area to everyone - but I can only assume that maybe easier on the CM than identifying a subset of folks. I was really happy that I booked it since it was actually a highlight of our night and really enjoyable and stress-free after dealing with the rain most of the night.