I too live in a warm winter place and dont do the PINK STUFF winterizing. I do however carry the city water CAMCO 36153 Brass Blowout Plug adapter and Q-Industries MV50 portable 12VDC tankless air compresor. I can blow-out the water system in a very short time period and then add a little pink stuff the sink drains if I get caught in a two or three day very cold area when camping.
photos from google images
The 12VDC air compressor also works great keeping air in the truck and trailer tires