Unattended in FL until you arrive, I would just open all the low points, water heater and fixtures while you where gone, that way even if a cold snap where to come through and stay long enough for the remote chance of a freeze up of the lines there will be room for expansion and avoid a blow out.
I use my RV until thanksgiving in the local mid-atlantic area, and right about now is when I start doing that just in case we get a decent couple days of cold weather. If we are looking at true week of below freezing at night and near freezing during the day I will make the trip out to the trailer to pump in the pink stuff. Otherwise, I winterize at the end of thanksgiving weekend and call it a season (until my FL trip in January.)