Not too sure of what hotels are nearby but there should be plenty a bit south of there (around the I-71/I-275 area).
Kings Island, itself, could probably fill two days' of fun if you wanted to do everything. I haven't been in a few years but plan on going in a couple of weeks w/my daughter to check out all the Nickelodeon stuff.
But, be careful on Son of Beast. A friend of mine hurt her back on it a couple of weekends ago.