Leaving evening of September 24. Staying 9/29 at Becky's in Long Beach, CA. Arriving home night of October 5.
Generally, I-70 out: Manhattan → New Stanton, PA → St. Louis, MO → Brewster, KS → Cedar City, UT → Long Beach, CA.
Similarly, I-40 back: Long Beach, CA → Joshua Tree, CA → Sedona, AZ → North Rim, Grand Canyon, AZ → Tucumcari, NM → Broken Arrow, OK → Nashville, TN → Lynchburg, VA → Brooklyn.