I would love to tell/show everyone how I do this.
Right now Im on a week break traveling from from Norcal to Socal and back, so I cant post pics of my garage setup. I will once I return home.
I can tell you how I do it....
I have a two story home and the garage is located under the master bedroom. The garage has 18 x 2 joists that run the width of the garage. I took strongties and 4x4s' and attached them between the joists. Each strongtie is rated for 2000 lbs. Given that I have two strongties per each point and there are a total of 4 points, I have a tremendous working load potential. Further, I use cable and eye bolts, each rated for a 2000 lb working load, running down to two 4x4's.
I also picked up a 2000 lb HF wench (the one on the shelf, not in the isle. heheheh) and ran that with the same setup described above.
Even though I have the wench, I dont use it anymore, or rarely. Typically I backup into the garage (again the backup camera is indispensable here), inflate my airbags to 85 lbs ( to lift the rear end up to within 1" of the hanging 4x4's, slide the camper off the back of the truck about 6", swing the board under and slide two blots through the rail holes to keep the board from swinging out, then lift the front of the camper up and let the second board swing under. I also have a 5/8" piece of pine on each of the four contact points to insure that the camper lip is supported on the wood frame. not the FG.
Now I must state, Im not a big dude. Im 5'8" and 165 lbs. These things are not heavy. eaasy breezy to take on and off.