You don't need a ton of volume, there's not that much volume to the piping system. If your compressor will blow up a tire at 30 PSI, you should be good. Just do one faucet at a time (don't forget the toilet and outside shower,) and finish with the low point drains. If you live in the South, many people feel that's all you need to do. If you're up North, then antifreeze is a good follow up to prevent any "spring camper opening" surprises.
2015 XLR Hyperlite 30HFS5 (mods being performed regularly)
2009 Salem LA 292fkds (gone)
Nights- ('12)23 ('13)23 ('14)15 ('15)31 ('16)25
2014 Harley Davidson FLHX (XLR cargo)
2014 VW Jetta TDI (diesel sipper, camping support vehicle)
2011 Ram 2500 CC 4X4 CTD, B&W Companion (toy hauler hauler)