Blew my lines out this year for the first time here in north LA. Usually not that cold here but we had several blast of subfreezing weather this round.
I did notice that it wasn't a short powerful blast that cleared the water from the lines, but rather a longer, continuous flow of air that finally brought it all out. Some good advice in previous post. I used my home shop 5gal compressor.
2013 Rockwood 8282WS
Reese Revolution Pin, Reese 16K
2008 Tundra Limited Double Cab 5.7L
Air Lift 5000 w/Wireless Air