I don't use double socks, however I use my 10-10-20 rule on hikes.

After the first 10 minutes of hiking, stop and adjust my boot laces.

I do the same thing again in 10 minutes then once more in 20 minutes. At this point, my boot laces are perfectly adjusted to my feet and without any slippage from the boots or them being too tight, I can walk all day without getting blisters.