Just to add to the discussion, I agree entirely with T_C and Bill Fezel. Power levelers are not necessary, and they are very heavy and very expensive. T_C's supply of short planks works great, and the tow vehicle does the work of side-to-side levelling, which is the heavy lifting.
However, I have to admit I am considering an electric tongue jack. Fore-aft levelling with the tongue jack is the (very) easy part of the levelling process. But to paraphrase the old German proverb, we get too soon old and too soon lazy. So I may do it.
By the way, in the interest of full disclosure, some people prefer to buy a couple sets of Lynx Levellers (aka Leggos, as T_C mentioned) to use in place of boards. I think you'll need about $40 worth if you boondock.
Bill
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