If you use the place after Columbus Day, winterize it each time before you go home.
You need to be thorough. I winterized a friend's place but their adult daughter took her boy-friend back after, for a romantic autumn get-away. They only drained the pipes and did not blow them out. The trapped water caused at least 4 leaks in the over-head pipes. Thank goodness they didn't know how to de-winterize the the heating system because the old-man did not want that anti-freeze stuff in it.
If you have section/zone valves in the system, you may wish to provide a minimum supply of water, to the toilet and a spigot, or just a spigot. Lugging your water in a bucket will be 'rustic' and help you get in touch with your inner pioneer!
Have fun, good luck!
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