okay, i'm flying into chicago tomorrow and was planning on renting a car and driving to des moines. however, i noticed that it's supposed to snow tomorrow and am wondering how much i should be worried about this. it looks like the accumulation is going to be light, and i'm going to be on the interstate the whole way. should i ditch my trip? i've never lived anywhere where it snowed regularly, so this driving in snow thing is very weird to me. any tips?