We have the Georgetown love it!.
When my husband done ours, If I remember correctly from last year, this year I had to take to Dealer to have winterized.
It is not a easy task for women our arms are too short to deal with this, ha, ha...
Under the water heater ours is next to the steps, lay on your back next to the steps look up you will find a valve (really have to reach).
the low point drain is the same situation where it says low point again reach up the valve is right there everything is under the M/H. We had a Jamboree seacher for 15yrs, that was so easy a child could do it.
The manual is not that clear, my husband had the factory rep on the phone as he was doing the winter care.
Please enjoy your new Motorhome and the paint design looks so like ours. Enjoy Take care Lana