If you have pink stuff in the lines, I would just drain it out and blow out the lines if you're just going to let it sit.
Are you planning to use it now and return to storage? We have carried water with us to use for the toilet and sinks and not hook up the lines or put water in the water tank. When we put the AS back in storage I just add a little pink stuff to the drains.
We came back from our winter travel and I just blew out the lines, figuring I was past any hard freeze. Then it went down to 27 from 3 AM to about 6 AM, very unusual for here but not unheard of. A few days later they were calling for 2 nights of 25 with the high only in the 40s. Rather than take a chance I went to the AS and put a gallon of pink stuff in the lines. It didn't get below freezing either night but I slept well knowing it was protected.
Just remember Murphy's law: Given a 50-50 chance that anything can go wrong, 9 times out of 10 it will.
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