I am also very happy to get your video and that finaly somebody decided to make wakesurf video, thanx Mark.
Suggestions are obvious, simply compare your video with others you like, watch the difference and you get it. (I like first Landlock promo video)
i.e. Cut more to get better dynamic in footage.
Maybe use not so slow slo-mo. Shoot all season to get more footage. Show falls and goofy stuff. Bikini too
Use more manual functions than automatic on your camcorder - for sharping and ligth stability (i.e. manual focus, white and colour balance). Rent camcorder with bigger lens and 3CDDs for better picture. Use external mic with that antiwind foam and you get way better sound. Or just simple stick piece of thin foam with double sided tape over grill of your build in mic - it quite reduce that nice windy noise.
Take care bout "special" effects. Audio level - when somebody talks to camera and turn his head away and level of sound drops (use microports etc.), hairs in picture
(but I love this touch).
Take care with postproduction (graphic, efects, maybe colorgrading) and good encoding to DVD format (its critical) and you will be surprised what you can produce - your work is worth of it.
Or call my brother. He is director of photography in Chicago and he would like to try some wakesurfing for sure