I always take a back up to gigs.
I am currently down to just 2 x 5 string basses and I take both to gigs for the bands where I use 5 string basses. They are a Maroose-chick 5 string precision and a fairly heavily modded EBMM Sterling 5 that is now passive with a Delano P pickup in it.
For the new blues band I use 4 string basses - I could use the 5s, of course, but, well, you know. I have a choice of 2 x short scale and one long scale so at the moment I tend to take the two short scale. They are a Gibson Les Paul Junior DC that is my current best and favourite and a lightly modded Squier VM Mustang. My fab JV Squier P stays at home in the case, mostly.
Been a while since I've had that few basses. Not sure how long it is going to last.
Oh, yes, I also have 2 electroacoustic and an EUB but they don't count