I was married in Niagra Falls New York.
One thing that you need to know is that if you fly into the USA side then you will not have to pay the 6 dollar fee that they are going to charge you to enter from Canada to the USA.
There is an airport at the Niagra Falls New York side otherwise you can route to airport code BUF for buffalo.
However the USA side of Niagra falls is not nearly as nice as the Canada side, but the hotels are cheaper (I found some for thirty five dollars if you feel like getting out of your car and looking several times).
The American side is well worth the look even though the view is not as nice. They do have a nice view and a very large park.
You will need your passports if you intend to go across the bridge on foot, and they do charge a fee if you walk across.
If you intend to drive across there is immigration you have to satisfy but they are not as gruelling as the airport ones.
If you intend to fly into Canada and stay on the Canadian side, it is nicer, however you will not get good prices on the hotel.
As for the rest of it,
The drive is fairly easy.
USA maps are fairly easy to read.
The petrol is cheaper on the USA side and so are the cigarettes if you smoke.
If you are looking for cheap cigs (if you smoke) then you want to head to a neary Indian resevervation. Locals can give you a clue to where they are. Cattaragus, and also Chitaqua I believe are some of their names.
The petrol is also tax free on the reservation.
Niagra falls ha a nice casino if you like that.
The one on the American side is also cheaper.
You can find parking for free if you jot down one of the side streets and find a spot on the road that does not have a no parking sign (this is legal to park there so long as the curb is not painted yellow).
Good luck,
God Bless
See my Niagra falls wedding photos at
http://myspace.com/fawnemine - November of 2007 (a few months ago).
Hotels for a week on the USA side cost us less than 120.00 (because we are cheapskates).