Short Term Winterizing?

So when we were still working and the 5er was in storage my winterization, consisted of opening the low point drains, while doing this I open the pressure relief valve. Then blowing the lines and opening each faucet and flushing the toilet while charged with air. This took about 20 minutes, I would do any time I was going to be out of town for more than four days. Pink stuff in P traps.
The beauty of the blow method is it doesn't require flushing afterwards, many of our winter parks didn't have full hook ups so flushing into tanks was not an option.