All above great ideas, but reservations would be a must. Lots to do around here, from educational history to touristy things to shopping an of course the falls.
When going to Canada passports or enhanced drivers licenses are a must, for kids or grand kids check on line for necessary papers both governments have boarder crossing sites.
Both sides have shuttles, in my opinion a must in Canada as hey have restrictions on parking. Their shuttle has packages that include attractions at a discount, again check on line.
When time gets closer give me a shout and I can give driving instructions and specifics about getting around.