I just looked at accuweather for cedar rapids. No lows go below 32 for the rest of October. Now, I'm not sure how accurate accuweather is. Plus, living in the city, vs out in the country, etc. etc.
I don't own an interstate. If I were in your shoes I'd park it inside on nights it was to be closest to 32.
It's a gamble, this winterizing thing. I'm always on the safe side, if in doubt, blow it out, and for insurance, I add the pink.
If you ain't havin' fun you ain't doin' it right
2017 Ford CCSB F250 XLT 6.2L Gas 4x4 Ruby
2019 International Serenity 30 Rear Twin