Hi Mike--
Just got out the relevant binder of pix; the day I was there, at least, for HIAS '96, the Lanc and Corsair flew together but the Canso didn't join them. I have one pic showing the Canso taxiing nearby, the Corsair taxiing way off in the distance, and the Lancaster airborne in a turn. Would very much enjoy seeing a photo of all three flying together, if that happened on the other day of the show...
You're right, too, about HIAS '96 being an excellent event, and '97 being terribly "flat" in comparison. HIAS '96 was for nearly a decade the only event at which I saw a B-2. Correct also about the demise of the shows not too long afterward. The 2001 show was the final edition. Melancholy to think about, as there was so much on the horizon at that time; in particular, Waterloo-based collector/pilot Carey Moore, a hugely enthusiastic individual, had just joined the CWH board and brought along his newly-acquired Sea Fury to the show...Carey had grand plans somewhat in the vein of what we're now seeing with Mr Potter in the Ottawa area, but of course at HIAS '01 Carey (and the Fury) had only three weeks to live...

HIAS died right after 9/11, but not because of that, rather for financial reasons plus the increasing busyness of Mt.Hope airport.
I think if there is ever a rebirth for HIAS, it would happen as a waterfront show like Toronto's, with spectators occupying the recently revived waterfront parklands on Lake Ontario. (And Hamilton's showline would face north--out of the sun--rather than south; so decent photos would actually be possible here!)
S.