@Quarry Man, I think it's great that you're getting with your grand father, I would have loved to do that when if he was alive.
Like many said, stocked trout should be an easy catch. I've seen a 2 pole method kinda like what bluebasser described except that 1 pole would be soaking a hook with powerbait and while the other is for a horizontal presentation like an inline or a spoon.
I started out as a fly fisherman and sometimes I would remove the rear hook on a popper and tie on a 2' or so section of line with a nymph or a dry fly, depending on what I'm seeing and would use bass fishing gear.
Anyway, good luck and enjoy your day with you granddad.