I had a truck camper for many years and blew the water out of the piping using a compressor at ~40psi hooked to the city water hookup. Sequentially open all the faucets multiple times until just air came out. Drained the water heater. Drained the fresh tank. NEVER had any problems and was nice not to have to use the pink stuff. It was stored outside in Colorado.
Do Scamps have a water drain plug at the low points like my camper did? I'm really asking for anyone with experience winterizing a Scamp with a compressor and had success. I know the pink stuff can work but would like to avoid. Also, the Scamp will be in my garage during the winter and it doesn't freeze in there, but we might winter dry camp.