Sounds fun, Trish. It's getting towards that time of year when it's best to hike. Falling leaves, crisp air, no bugs, the promise of winter in the air...my favourite time of year. If I ever get hitched, I want to drag the potential Mrs. up to the Whites in early October to propose - doesn't get much more romantic then that.
And I've only done Tecumseh once, in January. It was absolutely lovely and possibly even doable with Alex.
Have fun with that list - I haven't even finished the 48 once.