I'd love it if it could be in late June, July, or August so we teachers could attend. I know others like to avoid the months when school's out to avoid crowds, but that's when I always tour and it's great - the weather is the best (unless you're talking about a hot-weather place) and the campgrounds aren't too crowded during the week. Besides, if this was something planned in advance we could get reservations.
As long as I'm asking, the western states would be my preference. Eugene would be nice, as would Santa Rosa/wine country. Bozeman, Montana would be great; Sandpoint, Idaho and the Selkirk Loop; the San Juans/Bellingham area in Washington, with maybe a jaunt up into B. C.; Central Oregon - Sisters/John Day, etc.
There are so many possibilities!