One thing I will add for those of you who haven't been over the Sonora Pass in a while, the road has been improved and widened in most areas. I don't think there are any one lane areas left on it that I remember. It's two lanes the entire way. But those two lanes are very narrow in some points and there is a lot of traffic up there in the summer months. The biggest problem if attempting to take an RV over it is meeting head on traffic. There just isn't enough room in many places for an RV and a car coming in the other direction. And if you were to meet another RV head on up there, especially if both had a toad, you may find yourselves blocking the road for a long time while you unhook toads and try and back up to a place wide enough for both to pass. And you better hope that doesn't happen on the 26% grade section of the road.