Find a CG you like and make it work. Members in the CA forum can help. When we stayed in CA one year for a different trip, we grocery shopped over there bc I grew tired of reading can and can'ts online.
For the falls, we stayed on the US side at the state park and made small trips. We liked almost everything on the CA side better but found some things to do on the US side too. There is a cool hike on the US side near the whirlpool, we toured power plant, ate ice cream in Youngstown, and chilled at a pretty nice CG. I'd recommend avoiding the aquarium on the US side - soooo many better ones around.