you do if one goes bad in the middle of a show!I don't switch cords.
that makes sense i guess, if something did go south you'd just swap basses entirely, cable and all.Both my basses have it's own cord.
i only have one bass and i use wireless (and yes, the short cable for the wireless beltpack goes through the strap with no further thought involved). i have a spare wireless cable ready, and if the entire wireless system fails it has a long cable from the base station to my pedalboard, i can yank the cable out of the receiver, slam it right into my bass and carry on wired.