California, UT, Alberta, B.C., WA, OR, back to California

Having done similar trips to those areas, with similar mileages and days on the road, that sounds like a pretty good itinerary. It sounds like you are not trying to cram in too much stuff, and you have some nice rest breaks between long highway days. Most first-timers over-commit -- congratulations on resisting that impulse!

My only other comment would be to do one or two shorter trips with your new rig before launching the Big One. There will be glitches to fix and things to learn.