f you plan to use RV antifreeze for winterizing, you will need some kind of pump, either internal or external.
I blow out my lines with a compressor and only use the antifreeze in the P-traps. No need for a pump.
As another poster said get 5 or so gallons of drinking water (1 gal/day for two people) and keep a couple of gallons of tap water for flushing the toilet if you lose your water source. Taking a shower can be a problem using a gallon jug but it is not impossible-a pot and a rag will do the job.
