Any of you guys winterizing with air only?

we live in north carolina.. generally mild winters although we do go down into the teens at times. we usually go on a few weekend trips during winter if forecast is above freezing.

ive always done the compressed air. making sure to remember outside shower faucet, toilet etc. finishing with low point drains.

i pour rv antifreeze in sink traps and a few gallons to black tank and grey tanks to reach valves.

so far no problems