I've seen trail crews use some very elaborate, reliable, and highly effective hangs for base camps where large quantities of non-freeze dried foodstuffs must be protected and where "don't cook within a mile of where you sleep" is just not possible.
That said, I personally do not feel that high hanging is worth the time, effort, and frustration for camps that move every day. There is a real possibility that if you do get it up high enough, you can not get it back down. Then what?
Take a good look at the types of trees along the PCT. WA and OR are mostly conifers - primarily Douglas Fir. The first branch is often 40 feet or more off the ground, and the branches tend to be grouped together (the Sequoia is a master at this). Tossing anything over one of them is iffy at best; and impossible with a Sequoia.
In many years of backpacking in OR and WA, I've slept with or very near, my food bag without bear problems. I do hedge my bets by putting my trash in an odorproof bag hung about 3 feet off the ground about 100 feet away from camp.
Numerous airborne camp robbers have swooped in to help themselves to whatever was handy when I turned my back, and I did lose one bag of gorp to a banzai charge by field mice during the night, but only because I foolishly left it on my hat instead of hanging from my trekking pole.
Using bear cans in the Sierras make sense because much of the trail is above timberline (aka no trees). Below timberline, the bears are well schooled in the subtle art of taking down hangs. That's why they're not legal methods of food protection in Yosemite NP. suck it up, carry the extra weight of the canister, and sleep soundly at night, knowing your food will be safe. Yogi might move the can (if you don't place it right) but he can't get into it (assuming you closed it right).