On this type of trip, I try to take only minor projects. I can't afford to take something good, or an order from my Etsy shop. If the bus lurches and someone spills something on my project, I would be crushed.
For this trip, squares would be good. Fingerless gloves or hats or scarves for the homeless, would be fine, too. They must also be uncomplicated projects.
I used to try to read on bus trips, but there is something about me that encourages people to interrupt my reading and start chatting. At least with crochet, I can still work while they talk at me. And, in the end, I will at least have completed a small project or two.