Congrats and welcome aboard. I always de-winterize in the campground on my first trip of the season. The pink RV anti-freeze is drinking water safe, so a perfect flush first time out isn't critical.
To de-winterize:
1. Install drain plug or anode rod in the water heater.
2. Align water heater valves such that the water will flow through the water heater. Close the water heater bypass valve.
3. Open a cold water and hot water valve on one of the sinks inside the camper, preferably the farthest from the hose connection.
4. Hook up water hose with an RV water hose pressure reducing valve.
5. Slowly turn on the water. Watch for any leaks from beneath the camper.
6. Bleed air from water lines through the open sink valves inside. Run water until air is bled from water lines and water runs clear (not pink). Repeat for all other sink, shower, and toilet valves inside. Carefully check around and under all fixtures to ensure there are no leaks.
7. Bleed air from outdoor shower and run water until it is clear.
8. Open low point drains until they run clear, then close.
9. If your unit is equipped with a water filter, shut off the water and install a new filter element, then turn the water back on.
That's pretty much all there is to it. If the temps dip below freezing for a few hours overnight, I doubt you'll have any problems. I normally don't winterize my unit until mid-December. We usually start dipping below 32 at night in late October. I've never had any problems with it. Of course, I always winterize before we have any extended periods of freezing weather.
Good luck!
