Ok, you've done all the prechecks before heading out to a gig. What if you lose a strap lock, or your strap goes missing at a gig?
Why would my strap go missing at a gig?
Seriously, I keep my eye on my gear, possibly more than most people. In more than twenty years of use I've never "lost" a Dunlop straplock. That would require an extremely sturdy C clip to fail and even without the C clip it still works. If the shaft bearings fail, guess what? I carry a spare set of strap hardware in the bottom of my amp bag. Seriously.
If my strap goes missing it usually means I have a much bigger problem... that my basses have all gone missing. Or my car. Or me.
I take two basses to gigs. Most have the same type of strap lock, the others use a standard strap. I carry a 3.5" wide Levy's leather strap with Dunlops as my main strap. I also carry a Comfort Strapp with Dunlops in the second bass' gigbag. I also have a 2" wide Levy's leather strap without straplocks AND a fabric strap too... just in case.
All of these are in my gigbags or amp bag. And I also take a second amp bag becuase I carry a spare Markbass LMII on all of my gigs... with some spare parts in that bag too.
In short, I'm prepared. Beats not being prepared. I know that if I don't have working straplocks on the recessed basses I have to sit down... so I make sure I have them. I know I can't just borrow a strap from just anyone on a gig. By the same token I've lent people straps on gigs several times.
So, back to your hypothetical situation... if the planets somehow align and I lose BOTH gigbag's side compartments, ALL of my straps AND my amp bag, I guess I'd have to sit down... provided I didn't also lose my basses

. And to avoid that in the future I'd probably buy several inexpensive straps and along with the extra Dunlop hardware I have, leave them in each of my vehicles.
Just in case.
You may think I'm exaggerating the level of redundancy I've stated but IMO it's no joke showing up and realizing you forgot something. I like to show up, get paid and go... the less drama the better. IMO there's really
no excuse for not being prepared so I don't try to make one.
