Winterizing our Georgie Boy Cruise Master

I have a 1996 GBM. I just drain and flush the hot water tank put the plug back in. There are 2 low point drains in the water compartment that drain the pipes and tank. They have 2 T handles that you pull up to drain. Once drained I close them and attach a compressor to the city water fill via a fitting with a schrader vale that you can purchase at Walmart. Switch the city water valve to fill and just blow the remaining water from the lines from the shower, bathroom sink, kitchen sink and outside shower. Hope this helps.