My .02 cents.
1- Installed jacks to the frame will take up 4” of ground clearance while retracted.
I guess depending where you install them , that may or may not be an issue.
2- keep in mind that the motorhome parking brake only locks the rears. Even blocking the fronts , don’t get too crazy lifting the rears.
You will probably need to carry wood blocks to place on the ground to prevent the jack from sinking in , why not just put wood under the tires where needed. Its less work.
I never use my hydraulic jacks since i installed a set if levels inside my cab. All i need to do is move my rig a few feet N-S-E-W to level it.