I do remember getting special treatment at the Pepsi pavilion because my cousin worked there. Ironically, I haven't been back to NYC since even though I live in Maryland and it's only 4 hours away or so - I totally missed the WTC twin towers.
I missed the Pierson's Puppeteers exhibit, yes a Niven fan too. Read most of the known space books and the stuff he wrote with Jerry Pournelle, Was also a big Chaos Manor fan from Byte mag. Read Greg Bear too.