Leveling side to side

[camper4]

We use some boards but usually use the Orange, leggo type ,Blocks to build up one side. I've seen people using jacks and it seems to take more time and be more difficult. I think the bottle jack, like I use to change tires, would work better than a scissor jack, but then I would want to block under the frame or wheels anyway.
I've also seen people dig out the high side to level too.