Hi Roger--
CWH is certainly the main aviation attraction locally, of course. There are a few vintage birds at Brantford airport too. Also in Brantford, tucked away in an industrial district near the river, there's an interesting military museum that holds fullsize mockups of four WWI aircraft (Nieuport 17, Fokker Dr.I, Albatros D.V and Pfalz D.III) among military vehicles and memorabilia. Sharing the building is a collection of vintage motorbikes.
Also based at Mt.Hope is Sandy Thomson's Fury (NX1324, the one that was at Gennie, OSH and Yankee). It lives at the Avitat (Marsh Bros., which a bit ironically is quartered in the remaining, nicely renovated, bay of old CWH Hgr#3). Might be worth trying to get in touch with Sandy.
If you're into Navy history as well, the celebrated ex-RCN destroyer HMCS Haida is now berthed near the old Star RCNR base on Hamilton waterfront. It and the adjoining (brand-new) maritime museum are open for tours. Also, there is another small military museum in Battery Lodge on the grounds of Dundurn Park on the west edge of downtown Hamilton (about 250 paces from where I'm now seated!).
Bit farther afield there are Guelph airpark (Tom Dietrich/Tiger Boys); Victoria (Brampton) airport (Great War Flying Museum); and the 6SFTS museum at Dunnville. And of course there's the Connie and a couple other ground-bound oldies at Toronto (Pearson), and TAM at Downsview. At Markham is the Al Rubin collection (very private) and at Chippawa is the Ed Russell fleet (ditto). In Dundas there's a T-33 on a pylon at the local AF club. In Kitchener there's a GRP Spit replica atop an aviation theme giftshop on Victoria St.
And BTW, if as many warbird guys do you also like old cars...there's a nice cruise night Tuesdays at the Wilson Street Canadian Tire just off the 403 in Ancaster, and further northeast on 403 at Mapleview Mall in Burlington (Fairview St) there's a cruise Wednesday nights that frequently draws as many as 450 cars.
And of course there's an itty bitty "museum" in my loft!
Hope you enjoy your local stay...
Cheers
Steve T