Tip... Always put it (anode) back after draining. Two reasons: keeps "critters" from making a home in your empty tank and will keep the threads from rusting making it more difficult to re-install it in the spring (increases the likelihood of cross threading it, ruining the threads on either the anode or much more expensively, the tank itself).
My 2 cents, your mileage may vary...
2 Cats; J-Lo and Ragamuffin :R
2014 Thor Tuscany 40RX DP
2011 Ram 2500 Longhorn CTD HO
2011 Keystone Cougar 318SAB (now gone)
2008 FunFinder X 210WBS (Sadly gone)