ahhhh i misread.
shrugs and deads. and do try a few sets of barbell shrugs first either that or the hs machine for bigger loads then finish with a few sets of the db shrugs for good measure.
and when your strength begins to give out because the load is too heavy and your forearms can't take it,
this is where you have to figure out what matters more to you, grip strength or trap size. and if its trap size you need to get you some straps.
don't worry though your grip will still get stronger with straps anyways. blah.
i only mention deadlifts because sometimes i feel them in the lower/mid trap region.