My son and I would like to take a multi-day ride this winter, he can get some time off mid-January and we live in upstate NY (Otsego County). The plan is to trailer far enough south that snow and ice are not a probability (i didn't say possibility!) So the question is, generally (by latitude or cities) how far south do we have to go before we can go from 4 wheels to two? I don't mind cold, just want to avoid ice, snow and salt.