No but sounds like fun. Hiking the pct or a portion of it, is on my bucket list if I ever get to it .
If you have travelled with rei - do you feel that they taught you well enough so you could backpack on your own - I have done strenuous hikes such as half dome in Yosemite but I know backpacking is clearly a different type of monster. I was told that since I've never done backpacking that I should do a 3 or 3.5 level (out of 5) - do you agree?
Backpacking takes a large investment to get all the gear you need for it, so going out on an REI trip where they provide most/all of the gear is a good idea. Figure out if you like it first. Then if you do, invest in good gear. They will also teach you a lot of basic backpacking skills. I never did the REI trip, I just went out and did a 2-night trip in Hetch Hetchy to learn on my own. Next trip is a thru hike of the JMT!