Oil choices vs. 20W-40 Spectro Golden (feel free to chime in Slick)

Heading on trip this Spring (with 2 HD Glides and my XCT) from Norfolk Va. to Seattle Wa.; will change oil (even though will only have 1000 miles since last change) before leaving. Plan to change oil in Wa. State before beginning return loop; what oil should I use if I cannot find Spectro Golden (always used since Slicks advice).