Also, we parked at I think it was the "discovery center" then walked to the american side, maid of the mist and all that, then with passports in hand walked the rainbow bridge all the way to the Canadian falls. The next day we drove in and over to the Canadian falls to do the journey under the falls.
The restaurant by the whirlpool jet boats was pretty good, I think its called water street tavern or inn, but it can get expensive in a hurry. Jet boats were fun but bring change of cloths and water shoes (or they will supply you shoes) and you get 100% head to toe soaked lol.