To each his own but I can't imagine living within 45 minutes of Ames and deciding not to come because of this snow (now freezing rain/ice would be a different story). All it takes is leaving plenty early so you can drive about 40 mph if needed and you'll be fine.
This. Just give yourself extra time and you'll be fine. And the main roads (I-35, I-80, I-235, Hwy 30, 330, 20) get constant attention. I drove from Ankeny to CR yesterday afternoon and 330 and 30 already had the salt solution sprayed on.
Take it slow, brake early, give yourself extra time, and you're golden.