Shifting soil from rain, etc, has my 34' TT, which sits in this park semi-permanantly, sitting unlevel. The back side is lower than the front and one corner is now too low. Raising my corner stabilizers up and using the tongue to level it from end to end, still leaves the back side lower than the front. What type of jack and what capacity do I buy (and where do I buy it) to jack up the back end of the trailer high enough to put new/thicker boards under it, to level it, and will that take too much muscle? Or do I have to have someone pull it forward and back it up?