So I tried using Hexographer for the first time this weekend and I just don't think I have the patience for it. I pulled out some road maps for Oregon and Washington and will just use those instead.
I decided the next thing to do was to figure out encounter tables. In this campaign, every human, animal, and plant is either going to be mutated somehow or dead. So I'm not going to need some sort of Mutation tables to use. I have tables from Mutant Crawl Classics, Umerican Survival Guide, Mutant Future, and the revised Metapmorphica. I'll probably cobble something together from all of them. I also want to use Mind Games, a psionic sourcebook from the author of Umerican Survival Guide, and psionics are going to be another possible mutation.
I also did a bunch of internet research this weekend and compiled a list of wildlife native to Oregon and Washington. I found some cool creatures I wasn't aware we had here in the Pacific Northwest.
Now I need to compile the wildlife along with zoo creatures and farm animals and make some encounter tables and then some mutation tables to apply to any creature encountered.
If you have any suggestions along these lines, I'd love to hear them!