Dear Tweeters,
Thanks to one and all for the many excellent suggestions. Several Tweeters offered to lend me their books, and one kind Tweeter actually offered to mail me his copy of one of the books to keep! Between that book, and the recommended titles that I have ordered, I am all set for both trips. 
On a Washington birding note, I will report that I encountered drumming Red-breasted Sapsuckers in two different spots in the Upper Skagit Valley today. It is so nice to have that sign of spring, along with the skunk cabbage, the Tree Swallows, and the songs of the frogs.
Yours truly,
Gary Bletsch
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