Design ideas for a platform to lower camper onto...

They were called Budster blocks. From a 2010 post with photos:
https://www.rv.net/forum/index.cfm/fuseaction/thread/tid/23588386/print/true.cfm

I have thought about a cart but at over 5k, it seems like a recipe for disaster. I have casters that can easily carry the weight. Fortunately I have a spot to unload in my building and leave it.

If you need a visual on the concept of the plywood X's, take your hands and make the Vulcan salute with both hands. That's make a V with your ring and middle finger on one side, ring and pinky on the other.

Now take the two Vulcan salutes, point the open V's toward each other, and jam them together so they interlock. Now cut off your hands at the wrists (in your imagination, or literally, your choice) and pretend they're sheets of plywood.

JRscooby wrote:
Never did it under a camper, but do you remember the 2 plywood X we put under waterbeds? Sheet below, another on top to spread the load. And if you wanted you could flatten it on floor of bed, load camper on top if you think might want to unload away from home.

Agree. Got this from this forum years ago: For 8 foot bed truck: 1 sheet 4x8 plywood cut into 4 sections with each center section notched so they can be "x" ed provides adequate support. Add load distributing flat surface boards on top if you wish and lower the near full weight of the camper to reduce jack load. I've been using this for 15 years. Cheap and effective.

Rieco Titan offers a platform dolly for TC’s and Torklift offers the Camper Packer kits.

Stack a few pallets under the bed and lower the camper to you take most of the pressure off of the jacks.

My solution was 4 - 55 gallons drums with lids that I had sitting around. An undamaged drum (no dents) can hold a lot of weight! I stand one up at each corner of the camper. On top of each drum I placed some short sections of 6x6 timbers I had, aligned with the edges of the camper. This allows me to just leave the camper at the correct height to reload it onto the truck (my electric jacks are old and struggle). To be on the safe side I do run the camper jacks down so they just rest on the ground - not holding any weight but for stability. We have a lot of earthquakes here in Nevada!

Check out Sricky TRUCK CAMPER UNIVERSITY , second page Camper storage

I just use 4 stackable screw jacks with 4x4 toppers. You can pick these jacks up at Walmart or most hardware stores for around $40. Inexpensive, works on unlevel ground as you can adjust each jack and store your camper perfectly level side to side and the front cabover slightly higher.