Well that clears it up then!
Starting to think that it is partly a matter of manipulating the odds, a number of us coordinated our efforts and pulled a permit for 2016 in the main lottery. Admitedly we have to go in the middle of winter, but stoked for a chance to go none the less!!!
Since a lot of people put in for permits as groups, you kind of have to,
does theoretically improve your statistics though.
Who you enter with matters a lot to, if every one has all 5 points, you stand a better chance.
How many boating connections you have is another factor, I know some one that did a trip every year for like 10 years, he has been boating for a long time, and knows lots of people, and have to admit the man deserves it!
You could also consider things that get you invited on the grand, like previous experience, being a solid boater, owning lot's of the gear needed, playing the gittar people actually wanting to hang out with you! Etc.
Damn, this could really be some complicated math, something to waste my time with while wishing I was on a river though!
Think of me what you will, I got a little space to fill.