While having been to both sides of the falls several times, I've camped only on the U.S. side. I've used the KOA on Grand Island, Niagara Falls Campground & Lodging on Niagara Falls Blvd. and Four Mile Creek SP in Youngstown, NY. The latter was my type of camping, natural ambiance with a little space between sites. I can see all I want at a leisurely pace in two-three days. YMMV, but enjoy.
RVn Full-time