That seems like a pretty stupid plan given that it was only recently that Florida overtook Texas in legislative culture wars. Pretty much any other state would be a better choice.
I wish the PNW would get some love, we have very little going in terms of Amusement parks (the biggest one is in Idaho, you've probably never heard of it). Eastern Oregon has plenty of land...I can dream anyways.
The issue with the PNW is similar to the issue with Florida. Climate Change is going to nuke both areas out of habitability in the next handful of decades. While sure FL has conservative loons running things and that's problematic in the short to medium term for Disney that'll pass. It'll be being on fire or under water that'll keep them away.
I don't see how climate change is going to nuke the PNW. Our coasts are too high to be much affected (so we don't have issues with rising coast lines), while the heat makes summers more...normal for the rest of the country, the fact that we get rain 9 months out of the year should insulate us from the changes. Forest fire season does suck, but again, 9 months of rain a year means it isn't that long.
Perhaps we should all be buying in Alaska, however, given that it will soon be the next mild climate tropical destination :).
Wildfires are expected to get more intense and longer as climate change goes on in the PNW. I don't think you're going to want an inferno to be a destination point. It's nothing against the PNW - it's a beautiful part of the country we definitely need to preserve but if you're looking at things in decades I don't think you'd want to invest considerably into a tourist destination there if you're Disney is all.
Disney already puts up with yearly fires in Central Florida, which are as bad as anything we've had up here. Florida is literally a swamp on fire in the summer, which is such a contradiction!