What is this "winterized" you speak of???
Just kidding. For DW and me, this is just the start of our regular camping season but I do winterize, to a degree, between trips. That includes opening all the low-point drains and faucets and using a compressor to blow out all the lines. I also put some antifreeze in the "P-traps" so they won't freeze and crack. If it is going to be below freezing for a number of days, I add a little antifreeze to the toilet water, as well. Beyond that, the trailer remains ready to go at a moment's notice.
Happy Camping!
