Do we need to winterize for a few days in Yellowstone?

For those that have been following this thread please take my advice. It may save some grief and expense.
Do a proper winterizing of the RV by draining everything possible and adding antifreeze to all p-traps, including the shower or bathtub.
There are several you-tube videos and websites that explain the procedure in detail.
It sure beats having to do repairs before the camping season starts next year.