I know there is one special viewing area near Sounds Dangerous.
However, in my opinion there is no good place to see Block Party Bash anywhere. Basically the parade is in five stages.
1. Comes onstage near Guest Relations, goes up Hollywood Blvd.
2. Stops on HB and there is a performace for about ten minutes or so. You can really only see the part of the performance that is close to you.
3. Moves up to near Sounds Dangerous, with the tail end near the Sorcerer's Hat.
4. Stops again and there is a performace for about ten minutes or so. You can really only see the part of the performance that is close to you.
5. Goes off-stage at the Jedi Training Academy.
Yes, you can see the entire parade, but you can only see the entertainment portion that is closest to you.
And I know there are other special wheelchair reserved locations along the route; it is just wheneveer I am on parade crowd control I am near Sounds Dangerous.