ok, this is the wrong sort of tip... but i think it's worth mentioning.
if you're going to be out in the world with your lady en femme, i'd suggest somewhere OTHER than niagra falls. since it's on the US/Canadian border, there's lots of things you're going to want to see on the other side of the imaginary line guarded by men w/ uzi's. attempting to show your presumably male passport to these folks while donning a wig and tucking your goods is probably not the best of ideas. i'd suggest rethinking your locale or taking the trip to canada and leaving your persona in your hotel for the day.