Definitely Grand Canyon. Vegas would be fun and not too far from GC. So many places in Cali - we have the most diverse landscape in the country I think. Bodega Bay for birding, north coast for scenery. South coast for weather and gorgeous beaches. Tahoe is beautiful (I prefer summer there to winter). Yosemite is a must, and Sequoia Nat'l Park. Also Mono Lake, Mammoth and Devils Postpile is fun. Los Angeles - Hollywood you would enjoy, especially the observatory/planetarium at Griffith Park. San Diego is beautiful, visit The Palace (Cajun restaurant) in beautiful Santa Barbara. The Sacramento capitol is awesome (and very historical). I also enjoyed Birmingham, but didn't care much for Milwaukee - so if you skip that town you probably won't miss much.
"Struggle is a never ending process. Freedom is never really won, you earn it and win it in every generation."
Coretta Scott King