Trains! metrorewind.com/rewind/

Very small vintage motorcycle battery?

You could have squeezed more in. We used to do Costco runs in my Miata, those were an adventure.

Any bears?

Was it any good?

It's not perfect, but you can use the brush, you just need to rinse it aggressively first. The bristles are a little aggressive but the gravel some dumbass left stuck in the brush is going to do the most damage.

"rarely"

So it's not just me then. I've been shopping for luggage and constantly confused that every brand is just a little over the limit of my airlines.