In the past, the bike turnaround has been at the McKnight Park n Ride – that would be one place to watch. Otherwise, the roads along Heinz Field are the beginning/end of the bike course and are spectator friendly.
It’s going to be crowded this year because of the construction near Bettis’ – I think the transition area will end up taking most of the grassy area.
Also I remember the pavement on the HOV being less than desirable with lots of gravel and holes and crap, for those of you not riding on it overnight. Though it’s been a few years since I did this race, so it may have been paved in the meantime.