This thread makes me laugh.
Well, we've got the main 2 spots locked down, Main St and Frontierland. That's just about the entire parade route. Neither location is a secret "best spot". Neither parade is the "best parade" either. Especially if the weather is rough for the first one.
We were at the 2nd party in 2014, it was raining lightly for the first parade to the point that all dancers and characters were doing their "B" routines on the street. So when the weather eased up for the 2nd parade, a lot of people stuck around to see the "A" routines going full out. I saw little difference in attendance between the 2 parades.