Winterizing??

also new to RVing.  was planning to blow out system with compressor.  Does anyone else do this?  I'm assuming I'll also run some antifreeze in the drains.  

It would be tempting to let it go at that - a dip into the upper 20s might not be a problem, but it takes only one dip to near 20 or below and something's going to freeze.  Get some RV antifreeze and run it through all of your pipes (bypass the water heater first, but do drain it) sink traps, and tanks and leave it in until spring.  Unless you plan to camp in the winter.  You could leave a small electric heater running inside the pod, with the plumbing exposed as much as possible...but that won't protect the the exposed lines underneath.