Adding scissor jacks for side to side leveling

I don’t see the advantage to this, but to the Op, you may and that’s all that matters.
Personally, I carry 3ea 2x4s about 4’ long. If that’s not enough to level or close to level the camper then too bad or move the camper somewhere more level.
It’s just too easy. Pull into desired spot. Eyeball how much leveling needed. Either move fwd or back a few feet, lay down boards, pull camper onto them.
Or just put boards down if location isn’t that critical