pickle the engine
If you are going "somewhere" and you think it's going to be more than a month with a possibility of 2-6.... you never know what Uncle Sam is really going to do with you.... (After 3 tours, it was painfully obvious to me anyhow) Go fly the airplane for at least 15 min nice and hard. Cover the airplane (yes even if it's in a hanger), cover all the possible entrances for bugs... ALL THE HOLES..... and pickle the engine. Service the prop with grease if able. If it's fixed pitch, cover it with pledge. Try and wash it too..... I prefer before the flight and touch up after the flight. If you have jacks, feel free to place the jacks under the wings on the jack points and put a pound or two of pressure on the jacks in case the wheels go flat. Don't want to put stress on your wheel pants. Also, update your will. Give a trusted family member all your notes on what to do and when they should do it should you not be back for a while.
Best,
Brian Wallis