OK guys, I'm sorry for the "matter of fact" post, but I heard back from Blair at The Cottage waterfront Grill
and he can accommodate us as well. They are open till 10pm and there are no accessibility issues. Please check out their website. They taught "good for groups" and evidently have a large "dock" where we might hang (I believe it's supposed to be fairly warm). It's in Huntsville, though, likely a ~20 minute drive.
The Muskoka on the Rocks
is also accessible, and the "kitchen closes at 9:30PM". Please check out their website. They're closer to where most of you are staying.
It seems like either can accommodate us if we have a "reservation", so we can probably wrap this up late tonight or tomorrow morning, depending how quickly you guys vote!