Ride a proper traditional LB for while and you will find out.
Only one way to surf them. If you try and surf them like a modern board they won't work.
Traditional log is all about walking the board, trimming and getting back and dropping your weight over the fin to turn, the drop knee turn didn't come around cause it looked cool, was the only way to turn them..
Or you can get a modern board that look traditional and will surf kinda similar but be a lot more user friendly.
This is a good clip of traditional LB riding..
Pete Johnson stylishly surfing his original 1967 11 foot Hansen.