I'm with the other responders who say that you should cancel the RV trip and just motel it. The roads you are planning to use can be hazardous just for regular winter driving in a well-equipped vehicle driven carefully. At best, you won't be able to enjoy the trip due to the probable weather and having to get by with jugs of water for toilet use, being in cool sleeping conditions, trying to find open RV parks to spend the night in, etc. And then there's a good probability that you might get stuck somewhere due to road conditions and never make it to Denver. Where you're headed is not wise to do it in an RV, especially a rental that you have no experience with handling. Don't needlessly endanger your wife and daughter with a poor choice!
