Your not going to ever really clear them all out. What type of boat are you trying to get in there during hunting season? A pirogue or a surface drive?
If you have a surface drive, what you'll probably end up with is just a small trail through the lilies that you can run through on plane without stopping till you get to the pond. If you have to pirogue in, it will be more difficult. Either way once you get that small trail cut, if you just continually run over it with the surface drive, it will slowly open up more and more.
if you get someone with a big mudboat best if one with 350 chevy engine on it. it will run through those like without even trying. i got one my dads buddys to do that for me to a small little pond i found on map that had no openings so i could duck hunt it. hopefully someone will be come help you and its quiet amazing to watch. just when you think the sd is unstoppable those things are down right mean