The OP has offered such stunningly BAD advice it's hard to believe he's in any way serious ... surely this has to be a joke. :S
That said, he wouldn't be alone ... here are a couple of pics I took a few years ago in one of our provincial park campgrounds. Maybe this owner and the OP are related?! :W
How NOT To Level ANY Trailer
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The proper method of leveling
any trailer is to park the low side tire(s) on
something - wood, Lynx, Andersen Leveler, etc - and adjust front-to-back level using the tongue jack. Period.
And to the OP - trailer stabilizers typical of those on most popups, travel trailers, etc, are called "stabilizers" for a reason, otherwise they'd be called levelers. They're
stabilizers, designed to
stabilize the trailer, not level it. :R