Well, what are you trying to get out of it? If you have a few coaches you would want to talk with, email or call them and ask them where they will be. I wouldn't do one and just hope a coach sees your guy play, does not work that way.
HNIB is decent and will get you some Prep School exposure ( coaches and admission people at the event) but is twice as much as most other tournaments. Like it has been said, " Not what it used to Be"