I agree with Ted - Whilst I can appreciate the skill of the HP longboarders, I can only cringe when I see them. Just ride a shortboard if that is the style of surfing you want to achieve. The shortboard, for the most part is perfectly catered to this style of surfing. There are far more negatives associated with attempting this on a 9' + board then there are positives.
I love to watch logging when it is done well - I also love logging when I am participating (Performed NOT WELL)...
Best advice I have ever heard - If its under head high ride a log, if it is over head high ride a short board.
Sounds simple enough for me