Dan,check out
www.spearboard.com.There are all kinds of info there and there is a chapter here in Louisiana on that web site.Now as far as freediving and by yourself,that is not the best thing to do.Alos,you will need 100'-200' of floating rope and a jug on the end.Why?Becouse of the ripping tide we have some days and that acts as a life line.
Maybe we can get together on a trip.I will need to pick up a gun too,but I love to go for a dip out there too.Best dip was with a whaleshark one trip.Supper cool!That make life as I knew it big compared to life offshore before.Nothing has ever came as close as that other then swiming with a 5' sea turtle once which was cool too!
Oh,my wife will not get in the water out there.Guess she thinks I will start chumming.LOL