Since I have a high garage ceiling I have toyed with the idea to use 2 spreader bars, one across(east to west) the front of the camper roof and the same setup for the back. Drop cables straight down from the bars to the jack plates, use 2 1 ton chain hoists, one mounted above the fwd bar and one above the rear bar. You would be aligned correctly for the design of the jacks so there would be no side loading. If using one hoist point tie both spreader bars together(north to south) with another spreader.