Heading out west with our 36 footer

Unfortunately winter is our only option..we are prepared for the cold I know especially at night. I was originally planning to go from AZ straight over to Cali and head north until the weather got too unbearable with that plan I know we won't make it to Oregon..so I thought maybe heading up through Nevada to Umpqua NF early December and then start south from there..I really wanted to go to the hot springs and see a tiny bit of oregon.. We will scratch that if everyone is advising against it. I was also concerned with southern Utah weather and roads I would like to see some of the beauty there ideally staying for a few days of hiking but also will scratch that if it's terrible weather conditions..

Does anyone know about taking a 5th wheel on 89 89A from Page to Vegas area that time of year?