Bob Hartig
EF5
Oklahoma City is only 1000 miles and a 14.5 hour drive away.
"Only 1,000 miles": spoken like a true Michigan chaser.
I just checked out the distance between Seattle and Hays, KS. It's 1,660 miles. In other words, a good two days drive just to get to tornado alley, let alone wherever your actual target may be. Obviously you've got to be pretty selective.
Where I live, while it's a long drive to get to the Plains, I can still pull off mini-chases in response to developing weather. But, since I don't imagine you're fabulously wealthy and can fly whenever you want to, that's really not an option for you. Plus, unlike those of us who live east of the alley, you don't have the possibility of tracking with the weather system on the way back home. I think your only realistic option is, as has been mentioned, to block out some chase vacation time, most likely in May.