I've also installed a drip irrgation system. At the spigot is a pressure regulator, backflow preventer and polypipe adapter. The 1/2" polypipe runs up the wall, under and along the deck and when it emerges from the deck at the patio/slope transition, the polypipe is connected to 1/2" drip tubing (which is similar to soaker hose). The drip tubing runs around the edge of the patio and is then reconnected to 1/2" polypipe at the end of the bed. The polypipe is buried and then re-emerges in the bed along the fence where it's connected to another drip tube run through the mondo grass and is then reconnected to polypipe for a run to the garden. Along the entire run, the 1/2" pipe is tapped with tiny barbed drip emitters that feed 1/4" tubing. This tubing is supported by little stakes and the water is delivered directly to the base of the plant - as you can see in a few of the photos. Watering all the plants now takes only enough effort to turn on the spigot for a few minutes each day. I'll be getting a timer very soon. And as the watering needs grow, the system easily grows.
One ton of stone wasn't enough to do everything I wanted to do this year, but I think I'll wait until next spring to finish up - when Lil is big enough to tote stones for me ...