jacks up or down

Jacks down, Hydraulic fluid doesn't deteriorate an the jack shafts won't rust, check an old pc of abandoned construction equip thjat has set in the elements for years, most cylinder shafts look like new! Take as much of the coaches weight off of the tires & suspension as possible. 4 hydraulic legs don't care, careful U block the drive wheels so it doesn't roll, 6 tires sitting can develop flat spots over time, zero weight on em, zero problems other than sun exposure, If that doesn't make sense to U, nothing will.