Give your raspberries a place they can spread out, as most (all?) send out runners. You can eventually end up with a whole row of berries from a single plant if you are diligent and patient. I have no idea about blackberries, my property is over-run with the escaped Himalayans so have never even thought of planting one. All berries like lots of water, though, particularly after they've set fruit. And sun.
P.S. Warm welcome from the Pacific NW.