Leg supports for truck camper storage

Maybe wooden box, with a rim so the jack foot can't slip off?

same tc made a rolling table. lowered the tc down and could store it any where .

midnightsadie wrote:
same tc made a rolling table. lowered the tc down and could store it any where .

The way I read OP, he does not pass the Lincoln test; His legs are not long enough to reach the ground.
To store, the rolling table is a good idea.

I lower my camper onto a stack of pallets. I use blocks under the jack legs and keep some of the weight on the jacks as well as the stack of pallets.

what I ready they are saying is because the truck is so high so they put blocks UNDER the camper legs to allow enough room to lift the camper off the truck.
this spring while loading it one of the blocks shifted

What I would do is build a platform where the front and rear blocks are all connected. Remember you only need the front blocks to clear the tires, the rear blocks can be larger. You can still tie the front together with a treated 2X because the truck can drive over that with no issues.
If you build a small deck type platform with all 4 blocks connected, with a good foundation of some sort so they don't sink in I bet it would solve your problem.

There are made made leg extensions with different means to attach, yield 6-8" length. Happijacs style that bolt to existing jack pad or Atwood style where you cut off pad and leg inserts into ext and pins (like tongue jack foot).
Easy to fab if you have means.
/.etrailer.com HappiJac 182495
/amazon Atwood 40302

That is my biggest concern, that the camper will move/twist to the side. Its a worrisome problem for me. I use a small trailer (Zieman) used for golf cart to set the camper on, if its not on the truck. My jacks just "touch" the ground and the camper rests 90% of its weight on the trailer. The result is that the camper is low to the ground, it is secure and getting in and out is easy and steady. I can move the camper any where I want, out of the way in the winter and in position when ready to load. works for me.

Seems like most of you didn’t read the OPs post......
To the OP, I’ve never seen a camper “shift” enough for this to happen.
Possible Solutions: Since we have no idea what actually caused your camper to slip or move in the first place.
1. Bigger footprint blocks
2. Proper raising or lowering procedures
3. Don’t run into the camper with the truck

Is the issue the camper moving at back, or falling off the blocks when it moves? Maybe set wooden blocks on a set the dollies used to move a car in the shop. That way movement would not let it fall.

I set my truck camper on cinder blocks,three stacked on each corner with a 2X6 across each end..Wind and heavy snow hasn't bothered it at all and I'm in and out of it often..