Jacks:
Extend them as short as possible for better stability of the camper. Thus, blocks will not wiggle, so stack them as high as you can.
Problem:
Longer trailer requires more blocks, even on slight inclines or declines, the distance from the ground to the bottom of the camper is exaggerated, the longer the camper. Solution? More or bigger blocks.

How to transport all those blocks, and I have a bunch. I also carry several lengths of board to use under the tires for sites that are uneven left to right. I have enough to raise one side of the trailer 10 inches (which is a lot). How to carry all that lumber?
Well, you've got to have the right shell on the back of your truck. Then it doesn't matter if the blocks are dry or wet. In addition, a professional construction style shell provides lots of storage in the side tool boxes (2 shelves full length of an 8 foot bed), and all the space in the bed of the truck.




Plus, if I put the ladder rack back on the top of the shell, I can carry our canoe.