Dude... this a a great plan and similar to what I am thinking for next year. Cascade Crest would be epic... another on my list is Pine to Palm. I love the PNW and have good friends that live in Seattle and Bend.... i could move there in a heartbeat... only other place outside of Colorado that I actually have a desire to live.
I definitely want to do more endurance mtb racing last year. i had a blast a silver rush and it's nice to not feel beat up all the time when putting in big volume. Bailey Hundo is on my list. I still have a goal to run western states though... i'll probably enter the lottery and try to do a golden ticket race no matter how the slim the chances may be. If I don't get into that I either want to run Leadville or one of the PNW races.
Cascade Crest is such an easy logistical race as well. Flying to Seattle (if you haven't looked) from Denver can be extremely cheap. I've raced in the PNW 3-4 times and each time was cheaper than doing a similar race in CO where I'd need to stay near the course. I'd be stoked to do the Hundo now that there are very few road sections (old course had TONS of dirt road, leader averages went from 16+ mph to about 10 mph). Only bummer about the Hundo is the cost ($400+ if you front the cost of entry plus the required fundraising and I'm not a fan of the raising money portion regardless weather the cause is good, even though it is).
I've gone sort of full circle on Western. When I was green it was a must, then I got jaded about the whole thing, now I think I'd like it (though it seems expensive for the whole thing) but currently I'm restricted to the Hardrock qualifiers list.
Leadville is an interesting one too, but definitely worth doing. I'm never sure if I'm done with that race (truthfully I probably am), but I do like hanging out and pacing. There are pretty stark Pros and Cons for us front range guys. Super easy to crew/travel/train. It's got the big race feel, all that stuff is good. The only real drawback for me is the course, which I find to be sort of meh. I know why goes where it goes, but I only have so many more of these races in me and for the most part I want to be on actual trails. I maybe had one of the better races I've ever had there, but it was also my first 100, so if I went back it would be to break 20 hours, and I'm not sure I've got that kind of effort in me at the moment with where our family obligations lie. Who knows though, I'm still young...