How long will it be in storage? I see you are in Orlando, so freezing should be no problem. Here in the north, I open the low point drain when storing and winterizing, but not during short (2-3 weeks) between-trip storage.
If you are going to store for more than just a few weeks, I would open the drains and get that water out of there so it doesn't algae up or get stinky on you, especially with hot weather coming. Just open up the drains and open the faucets on each sink, shower, toilet, etc. so air can get it and water can come out.
If you are storing for an extended time, be sure to also open the drain on your hot water tank and drain that out as well. Those HW tanks can get pretty stinky if water is left to sit in them for a long time.