Leveling side to side method from seasoned campers

I have always just used the wood blocks and I do have one bag of the lynx and have never been off by an unacceptable amount. If you want perfection then you are too OCD. If you don't roll out of bed you should be good. I have always been able to get level side to side within 1/8 bubble.

For those with the Andersons..... do you support both axles? If just one axle does it torque the frame much?