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Iowa and South Dakota rely mostly on wind and are amongst the states that have the cheapest electricity in the USA - https://web.stanford.edu/group/efmh/jacobson/Articles/Others/24-08-Letter-Vance.pdf
List of countries and states and their % of renewables: https://web.stanford.edu/group/efmh/jacobson/WWSBook/Countries100Pct.pdf
It's certainly true it's easier when you have hydro though.
Iowa and South Dakota rely mostly on wind and are amongst the states that have the cheapest electricity in the USA - https://web.stanford.edu/group/efmh/jacobson/Articles/Others/24-08-Letter-Vance.pdf
List of countries and states and their % of renewables: https://web.stanford.edu/group/efmh/jacobson/WWSBook/Countries100Pct.pdf
It's certainly true it's easier when you have hydro though.