overoptimistic/unrealistic
Well, you've got a few things that you'll really need to reconsider.
That first step is a doozy - as in not a feasable plan. You really need to rethink your first day.
Denver to Bryce is almost 600 miles. That's at least a 10 hour day on the road, if you don't take any extra detours or significant stops, and don't take the detour you're looking at. So, even in the best case planning, you're not going to get there until 9pm - about 4 hours after dark at this time of year. Going via UT-24 will likely push your arrival to near midnight. Also note that Bryce is up at about 7,000 feet of elevation, and it will likely be very cold at night. You're going to need serious winter gear for camping here.
I'm also under the assumption that you'll be coming in after an overnight international flight? Trying to do that much driving after that kind of flying is not a smart idea. Its also probably very optimistic to assume that you'll be on the road by 11, once you deal with customs, and car rental.
I any case, I would strongly suggest you dramatically reduce your plans for the first day. Moab would be about as far as I would even consider traveling (even that will be a good 6 hours and is probably pushing things), but that would make more sense if you are thinking of visiting canyonlands anyway.
Your coastal plans are also simply not feasable. SF to Redwoods via the coast is again a very full day on the road and unless you leave at dawn, you likely won't arrive there until after dark. Redwoods to Seattle, even if you cut over to I-5 from Crescent City to Grants Pass and weather is good will likely be another 12 hour drive. That will have left zero time to spend any time in the redwoods. Going from the Redwoods to Seattle in one day via the coast is simply not physically possible.