When using one L1 and two B1s for a dj gig do u carry back up like another L1 and 2b1s or something else like a jbl eon g2 that can be quickly set up

I keep all my gear in a small trailer (6'X4') which I usually hook up to my SUV and take to every gig. It's all in there if I need it.

For those times I just toss one L1 in the back of the SUV, The simple answer is, "Compact"!

I was carrying another L1 model 2 with me to most gigs.

Now, for most gigs, I just bring a compact with me for back up.

If it's a smaller gig where I'll either be using the Compact or the L1 with one or two B1's I bring both & set up which ever suits the room best. If it's a larger show I'll always have both of my L1's there with probably at least four B1's. I am confident that a single L1 could pull me through the night if ever one should go down.
So yes I always have a back-up on site.