Hi David, as you say all contact numbers seem to be old.
If i were you i would make sure you have a rod license and just go fishing, one of the members will ask you for your club card then you can tell them about trying to get in touch.
They will soon give you a contact number for Kenny Barnes.
You wont get into trouble given the circumstances, if you need to tell them you were advised by Terry at Reelsport to do this.
hope this helps you and your son njoy the days fishing.