As someone who has lived in Iowa for 30+ years and with a house in Iowa (though we aren’t there a lot!), late February is much safer than early February! The worst weather I can remember happened in February one year with -30F temps. Killed half of the plants in my yard! Mostly lows are in the teens though. Assuming you have a propane furnace, just keep the furnace on even when driving. Watch the propane level though, something you may not think much about if you normally heat with electricity. A small “personal” heater of 200 watts or so can be put in the wet bay at night. And buy a remote read thermostat that you put in the bay and can read from inside. It will alleviate a lot of stress.
Note the vast majority of campgrounds will be closed completely. Find the few that have winter availability and make reservations. Many of those will only have electricity, no water, so make sure you fill your tank up before hitting cold weather country.
. Right now they’re in the teens at night.
