It is always a good idea to be prepared for a worst case scenario any time of year. One way to be prepared is to make sure you are traveling with plenty of fuel. It is a great idea to have a can of extra fuel with you to ensure you have enough should you be stuck somewhere. Make sure you also have plenty of propane in the tank when you begin your travels into snowy territory.
Operating an RV is a bit different than driving standard vehicles when its icy. Many smaller vehicles used for daily travels are front wheel drive and operate very differently when they skid on ice than an RV that is rear wheel drive. Take time to get acquainted with driving a motorhome before you take it out on your vacation.
If you are driving a diesel motorhome, shut off the exhaust brake to avoid the back end of the RV swerving and pulling you into a ditch.
Drive much more slowly than you would normally and leave a TON of space between you and other vehicles an RV needs more stopping time. If you begin to slide on the icy road slow down gently do not abruptly hit your breaks.