looks like the canadiana inn also does tours:
Niagara Falls Day Trips:
Leaves every day in morning and return around 8pm, with free time at the falls Includes tour of Queenston Heights, Brock's Monument, the world's largest natural whirlpool, Clifton Hill, and much, much more Stops at winery on the way for free wine tasting Costs between $40 and $50
no mention of the maid of the myst tour, power station, niagara-on-the-lake, butterfly conservatory, botanical gardens, a walk along the river, skylon tower (some these things are probably too obvious or not worth talking about. i dunno)
probably the offer is only for people who reside at the canadiana inn (like me!), but i could ask.
ah, the paradox of choice ;)