Problem with bowfishing is that it is VERY addicting. Haven't bow hunted in years mainly because I am busy shooting fish in Oct.
Anybody can come to the tournament but you might have some problems with you are not rigged up for night shooting. You can still come out and enjoy some BBQ and shoot during the day if you like. There will also be more than a few bowfishermen there and all of them are great guys and full of great advice.
If you like you an check out a few sites dedictated to the sport.
www.bowfishusa.com is the biggest. If you are looking to get rigged out then check out
http://www.sullysbowfishing.com/ and if you are really bored and just want to see a bunch of dead fish then check out
www.bowfishtexas.com