Chipmunks are way more destructive towards garden veggies I found, at least when I was living in Ontario. And you cant stop those fuckers unless you trap or kill them. I'm very glad we dont have squirrels/coons or chipmunks out here in 'Berta. My garden is even more glad
Not sure where you live, but if its only squirrels or 'coons, I wouldnt even bother for tomatoes. Id be surprised if they go for them. 'Coons would rather a trashbin than a tomato, unless they're starving, Id guess. I've never seen a squirrel go for anything but nuts, and treefruit (Apples) in Ontario, anyways.