Dropping generator on Lance 1161 is child's play. Yes I did it couple of times. You use camper jacks to raise the camper few inches off the ground, put some pallets or boxes, or whatever under generator pan, lower camper slowly to touch the pallets, pull the control plugs, disconnect hard wire, exaust and propane line, than loosen 4 bolts that hold generator to the camper (long socket extension very handy) and then lift the camper to let the generator sit on the pallets.
I was then pulling the generator by sliding it on make-shift ramps from the palets, but now thinking - I might just back up the truck under the camper and try if I can drive the camper out.
Generator is 80-90 lb so not that hard to carry once you can grab it comfortably.